Perhaps you have never actually had to deal with the "incredible crushing burden" of a high tax bracket, but it does not work that way. The tax does not apply

Perhaps you have never actually had to deal with the "incredible crushing burden" of a high tax bracket, but it does not work that way. The tax does not apply to all earnings, only the earnings over a threshold. If you cross the threshold then it is all earnings over that threshold which are taxed at the higher rate; in your example someone who made 251000 would pay the higher rate only on the $1000 over $250000.