I guess I don't know your background or what you do, or whether you have ever employed anyone, or for that matter, whether you've even said so on this board. However, I employ people, and have for more than 30 years. I can tell you that the "bulk" of my costs relating to employees is their wages or salaries. That's not to say that other things, like insurance, taxes, retirement contributions, workers comp, unemployment, etc..., are insignificant, because they certainly aren't.
For us, it normally runs about two thirds / one third. Two thirds of the cost is wages and salaries, one third is all the other stuff.
But that raises an important point.
Let's say I am paying a full time employee $13/hr. Their annual pay would be $27,040, but their expense to me (using the two thirds / one third breakdown) would be $40,560.
But now I raise their pay to $15/hr. Their annual pay would go to $31,200, but the other stuff is going up too, because pretty much all of that is hinged to wages. Their retirement contributions, work comp, unemployment, bonuses, etc... When that happens the cost to me maybe goes to $46,800 (on the two thirds / one third basis), which ends up increasing my costs for that one employee by 15.4%. That's not insignificant.
Now, none of my employees earn less than $15/hr., so whether they change it or not doesn't affect my business at all. But to just say, "it's a buck an hour" sort of misses the point of the actual costs involved.