Except if you make tax rates too high, or the tax code full of "goodies", then revenue can actually go down because more people will take advantage of the goodies, or move to the underground economy to avoid the tax man.
People will pay taxes if they think the system is not rigged. IMO, the system is rigged. So, he're part of the text of the letter I'm writing to my elected Representatives (all deep, deep Blue).
1) Eliminate all tax filing except for single.
2) There is a standard deduction of $40,000 - $50,000 (depending on the cost of living in your state) that is adjusted every 5 years for inflation. No other deductions
3) Count all income from all sources, including currently tax free or off shored, or otherwise currently hidden from taxation.
4) Allow a 10 year phase in to count the previously taxed income. In year 1, 90% is excluded from taxation. The exclusion is lowered by 10% every year until it gets to 0% (80, 70, etc.)
5) Tax brackets -- taxable income up to $100,000 -- 15% 100,001 - 200,000 - 20% 200,001 - 300,000 - 22.5%, 300,001 and over 25%
Corporates -- use Generally Accepted Accounting Principles (GAAP). Allow a 5 year phase in to eliminate the differences in your books between tax code accounting and GAAP.
Taxable Income -- 15% of all taxable income over $500,000
I think it would get more income than what we get now.