According to the NCAA financial reports it appears that the schools are responsible for paying the officials, but they category includes all event staff as well as other game day expenses required to play a game. I looked at the 19 schools I have financials for from both 2010 and 2020 and game day expenses increased about 45%:
[TABLE="width: 281"]
[TR]
[TD="class: xl73, colspan: 4"]Game Day Expenses[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD="class: xl72"]2009-10[/TD]
[TD="class: xl72"]2019-20[/TD]
[TD="class: xl72"]Diff.[/TD]
[/TR]
[TR]
[TD]Average[/TD]
[TD="class: xl70, align: right"]109,065[/TD]
[TD="class: xl70, align: right"]158,938[/TD]
[TD="class: xl71, align: right"]45.7%[/TD]
[/TR]
[TR]
[TD]Median[/TD]
[TD="class: xl70, align: right"]85,421[/TD]
[TD="class: xl70, align: right"]123,102[/TD]
[TD="class: xl71, align: right"]44.1%[/TD]
[/TR]
[TR]
[TD]Total[/TD]
[TD="class: xl70, align: right"]2,072,231[/TD]
[TD="class: xl70, align: right"]3,019,816[/TD]
[TD="class: xl71, align: right"]45.7%[/TD]
[/TR]
[/TABLE]
So, officials pay should have increase about 45% to match the increase in all other game day expenses. For comparison those same 19 schools saw their coaching compensation increase about 66%:
[TABLE="width: 281"]
[TR]
[TD="class: xl74, colspan: 4"]Head Coaches[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD="class: xl72"]2009-10[/TD]
[TD="class: xl72"]2019-20[/TD]
[TD="class: xl72"]Diff.[/TD]
[/TR]
[TR]
[TD]Average[/TD]
[TD="class: xl70, align: right"]288,587[/TD]
[TD="class: xl70, align: right"]475,528[/TD]
[TD="class: xl71, align: right"]64.8%[/TD]
[/TR]
[TR]
[TD]Median[/TD]
[TD="class: xl70, align: right"]231,540[/TD]
[TD="class: xl70, align: right"]464,098[/TD]
[TD="class: xl71, align: right"]100.4%[/TD]
[/TR]
[TR]
[TD]Total[/TD]
[TD="class: xl70, align: right"]5,483,161[/TD]
[TD="class: xl70, align: right"]9,035,033[/TD]
[TD="class: xl71, align: right"]64.8%[/TD]
[/TR]
[TR]
[TD="class: xl74, colspan: 4"]Assistant Coaches[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD="class: xl72"]2009-10[/TD]
[TD="class: xl72"]2019-20[/TD]
[TD="class: xl72"]Diff.[/TD]
[/TR]
[TR]
[TD]Average[/TD]
[TD="class: xl70, align: right"]199,076[/TD]
[TD="class: xl70, align: right"]335,806[/TD]
[TD="class: xl71, align: right"]68.7%[/TD]
[/TR]
[TR]
[TD]Median[/TD]
[TD="class: xl70, align: right"]175,465[/TD]
[TD="class: xl70, align: right"]320,334[/TD]
[TD="class: xl71, align: right"]82.6%[/TD]
[/TR]
[TR]
[TD]Total[/TD]
[TD="class: xl70, align: right"]3,782,451[/TD]
[TD="class: xl70, align: right"]6,380,316[/TD]
[TD="class: xl71, align: right"]68.7%[/TD]
[/TR]
[TR]
[TD="class: xl74, colspan: 4"]All Coaches[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD="class: xl72"]2009-10[/TD]
[TD="class: xl72"]2019-20[/TD]
[TD="class: xl72"]Diff.[/TD]
[/TR]
[TR]
[TD]Average[/TD]
[TD="class: xl70, align: right"]487,664[/TD]
[TD="class: xl70, align: right"]811,334[/TD]
[TD="class: xl71, align: right"]66.4%[/TD]
[/TR]
[TR]
[TD]Median[/TD]
[TD="class: xl70, align: right"]408,826[/TD]
[TD="class: xl70, align: right"]788,417[/TD]
[TD="class: xl71, align: right"]92.8%[/TD]
[/TR]
[TR]
[TD]Total[/TD]
[TD="class: xl70, align: right"]9,265,612[/TD]
[TD="class: xl70, align: right"]15,415,349[/TD]
[TD="class: xl71, align: right"]66.4%[/TD]
[/TR]
[/TABLE]
And total expenses increased about 75%:
[TABLE="width: 281"]
[TR]
[TD="class: xl74, colspan: 4"]Total Expenses[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD="class: xl72"]2009-10[/TD]
[TD="class: xl72"]2019-20[/TD]
[TD="class: xl72"]Diff.[/TD]
[/TR]
[TR]
[TD]Average[/TD]
[TD="class: xl70, align: right"]1,805,154[/TD]
[TD="class: xl70, align: right"]3,163,327[/TD]
[TD="class: xl71, align: right"]75.2%[/TD]
[/TR]
[TR]
[TD]Median[/TD]
[TD="class: xl70, align: right"]1,586,286[/TD]
[TD="class: xl70, align: right"]2,807,766[/TD]
[TD="class: xl71, align: right"]77.0%[/TD]
[/TR]
[TR]
[TD]Total[/TD]
[TD="class: xl70, align: right"]34,297,917[/TD]
[TD="class: xl70, align: right"]60,103,221[/TD]
[TD="class: xl71, align: right"]75.2%[/TD]
[/TR]
[/TABLE]
You don't mention what the pay was in 2010, so I have no idea what the increase has been, for either them, or the other officials you mention. Since I had already entered all of Maine's NCAA financials into another spreadsheet I took a look at the increase for game day expenses for each one:
[TABLE="width: 192"]
[TR]
[TD="class: xl65, colspan: 3"]Baseball[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]9,851[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]0[/TD]
[TD="class: xl64, align: right"]-100.0%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Men's Basketball[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]37,885[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]91,451[/TD]
[TD="class: xl64, align: right"]141.4%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Women's Basketball[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]48,433[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]88,401[/TD]
[TD="class: xl64, align: right"]82.5%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Field Hockey[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]8,433[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]12,060[/TD]
[TD="class: xl64, align: right"]43.0%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Football[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]31,050[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]52,490[/TD]
[TD="class: xl64, align: right"]69.0%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Men's Hockey[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]10,824[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]15,769[/TD]
[TD="class: xl64, align: right"]45.7%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Women's Hockey[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]13,768[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]1,200[/TD]
[TD="class: xl64, align: right"]-91.3%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Women's Soccer[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]7,971[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]9,215[/TD]
[TD="class: xl64, align: right"]15.6%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Softball[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]4,302[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]600[/TD]
[TD="class: xl64, align: right"]-86.1%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Men's Swimming & Diving[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]800[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]400[/TD]
[TD="class: xl64, align: right"]-50.0%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Women's Swimming & Diving[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]800[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]970[/TD]
[TD="class: xl64, align: right"]21.3%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Men's Track, Field & X-Country[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]1,163[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]888[/TD]
[TD="class: xl64, align: right"]-23.6%[/TD]
[/TR]
[TR]
[TD="class: xl65, colspan: 3"]Women's Track, Field & X-Country[/TD]
[/TR]
[TR]
[TD="class: xl63"]2009-10[/TD]
[TD="class: xl63, align: right"]1,400[/TD]
[TD="class: xl63"] [/TD]
[/TR]
[TR]
[TD="class: xl63"]2019-20[/TD]
[TD="class: xl63, align: right"]1,113[/TD]
[TD="class: xl64, align: right"]-20.5%[/TD]
[/TR]
[/TABLE]
Men's and women's basketball both saw large increases, as did football, with field hockey on par with men's hockey, but women's hockey was cut to the bone, as was softball and baseball. Instead Maine increased the percentage of shared game day expenses from 36.2% in 2009-10 to 44.2% in 2019-20. That doesn't account for game officials who would only work one game, but I've found many such variations in the reports like this.
Sean