I think that you are forgetting the fact that many of those people are the "working poor", you know people that bust their ass 40 hours a week and are still poor.
Another thing to consider if you give a wealthy person a tax break compared to a poor person. Most likely the wealthy person already has $ to buy what he needs, that $ sits in a bank on the sidelines....The poor person will go out and spend a much higher percentage of that $ just out of pure necessity.
I can understand your line of thinking, I thought the same way for a long time. I now see it differently with the help of recent history. Weve tried cutting taxes (Bush tax cuts) and seen that it had 0 positive impact. As a nation we are paying the lowest tax rates in something like 50 years.
Opinion is just that opinion. History is pure black and white fact.