It's not about making poor people rich. There will always be poor people. Society needs poor people. It is about keeping the wealth distribution - and with that also the political power and influence distribution - at least somewhat reasonable. At the moment in the US poor people are getting poorer and rich people are getting richer and this widening gap is really what the problem is.
I personally do not think it is reasonable that with tax breaks, poor people pay a higher percentage of their income than rich people, who in some cases make more money than they can really ever spend in a life time.