If you gave me $500, I'd buy a new dishwasher. But a rich person doesn't have to save money to buy a new dishwasher. Giving them more money isn't going to change their life in any appreciable way. Everything they want, they already have. But poor people want/need a lot of things they can't afford. Giving them a tax break means they can now afford to buy things they previously couldn't, which means Whirlpool sells more American-made dishwashers, hires more American employees, and pays more American taxes.
Oh and the reason Bush raised taxes in the 80s is to pay for a war. You can't fix the deficit, cut taxes, and go to war. War is expensive.