https://en.wikipedia.org/wiki/Poverty_in_the_United_States#/...
It did, this has improved, however it's structurally temporary. The effects of it are that it's also continually displacing larger numbers of the middle-class as our trade policies are moving what remains of our higher paying manufacturing base, what used to make up that lower to middle part of the middle-class blue collar workers, to lower paying countries.
So, if you think, with your single graph that poverty isn't increasing you're not looking at what's really happening structurally in the US economy and with all of the relevant data around you.[2]
We have College tuition that is unaffordable and an aging, out of work, unemployed, or underemployed workforce, with skills that have not kept up with the rapid change in the shift of American jobs and poverty truly is on the rise.
[1] https://www.statista.com/statistics/200463/us-poverty-rate-s...
[2] https://www.wsws.org/en/articles/2016/09/03/jobs-s03.html (Uncertain how credible this site is)
2) You bring up a lot of other issues that are certainly real problems but they are mostly claims about what might happen in the future. That makes them speculation not fact. And sure, your speculation might end up being true and some of those speculations could lead to an increase in the poverty rate[A]. But you should be careful to frame what you are saying as a prediction about the future not a statement about something that has already happened in the past.
A. Personally I think you're wrong. But that's speculation too!
This is a large-scale socio-economic uprooting. Many of them lack marketable job skills and the necessary finances to allow location portability.
We're experiencing a very large shift in financial wealth where the level of poverty in the country is increasing at rates not seen since The New Deal and that's the entire point: the Bay Area is an extreme example of this where economic disparity is so extreme. Add to that the socially minded nature of California and you have those people who "complain" of the lack of a social safety net at the Federal level or even a lack of a fair balance of distributing economic wealth fairly.
edit:
And our "capitalistic market economy" is anything but capitalistic, in fact it is predatory upon the poor and economically disadvantaged. [1],[2],[3],[4]
[1] http://reason.com/archives/2015/04/26/american-capitalism-vs...
[2] http://www.bbc.com/news/blogs-echochambers-27074746
[3] http://opinionator.blogs.nytimes.com/2013/09/17/making-money...
[4] http://www.huffingtonpost.com/2010/03/17/social-immobility-c...