Both the positive and negative experiences of wealth/poverty are driven largely by relative, not absolute, material situation, so this is not really true, as much as those who think that absolute material conditions should be the driver of utility think it is.
> The main problem of poverty, at least in America, is that the welfare system traps poor people in government dependency.
That was the theory beyond the welfare reform of the 1990s, which created new limitations, etc. It was quite successful in getting people off welfare (and pretty good at keeping them off, with caseloads not increasing much with the downturns that followed in 2001 and 2008), but far less successful at keeping people out of poverty (beyond the declines during the expansion the reform was passed in the middle of.)
> Another massive issue, homelessness, is due to terrible mental health treatment, which is especially sad.
You probably need to decide if the problem is too much or too little public support, since you've in effect argued both positions in the same paragraph.
I.E. banks benefit from cycles of debt (mortgage, credit card). It would be better for everyone, including the banks, if the poor were not put in cycles of debt and allowed to become wealthier. But the most profitable thing for a single, individual bank to do is issue predatory loans.
That's irrelevant, since it's not "everyone" who decides, but the corporate elites and rich players.
So if "Increased wealth at lower levels benefits everyone" but "decreased wealth" benefits them, they'll push for that. They also don't much care for long term effects -- short term gain is enough (they can always retire when the economy/society falls apart, and they don't have to mingle with the lower classes or send their kids to their schools etc, unless they want it).
There are market opportunities in doing business with the poor, but none of them are particularly attractive.
I don't think it's true, any more than it's true that every worker wants to work at whatever job hapens to have the highest salary. People are not fungible seekers of maximal profit.