Because you want to talk about federal income tax as if it were the only tax people pay, and it isn't. Taxes are taxes- it doesn't matter which govt entity collects them, they all cut into the bottom line just the same.
You also choose to ignore concepts like the decreasing marginal utility of money- Righties generally do, feeling like the last dollar on the top of the pile will do them just as much good as the first, when that's obviously not true.
Here's a little reality check- The vast majority of taxpayers would laugh all the way to the bank paying Clinton era taxes on an income of $250K or more, and you'll likely never make that much yourself.
Shee-it, Sherlock- They be giddy to make that much and pay pre-Reagan tax rates, because it's not the top line that matters, but rather the bottom.
High income tax whiners are self indulgent and self important crybabies with the greatest sense of entitlement of anybody in this country. I feel for them, I really do- Tears in my eyes as big as horseturds, honest.