Dear John: How to tell us you're gullible and stupid without using the words. 5% of your population is not made up of "illegal immigrants....who ran from their home countries because they committed crimes there and were facing jail or execution".
Poor people are poor in the USA because of stagnant wages and a taxation system which favours the ultra rich. The rest of your post about poor people is just right wing lies. You are the only first world country where the middle class is shrinking, and life expectancy is declining. More people in the USA are falling back into poverty than are joining the middle class or rising into wealth.
While 60% of Americans own stock, 90% of corporate ownership is owned by the top 10% of wealthy Americans. Executive wages are now hundreds, and in some cases thousand times more than that of their minimum wage employees. This economic model is not sustainable.
Yes, crime and poverty are linked. Locking people up isn't working. Those with limited opportunities will turn to crime. Given education and opportunity, most people will not become criminals.