I got tired of this propaganda about 25 years ago. It was bogus then, it is more bogus now.
In fact, this has been the mantra of Communists, socialists, social democrats and the entire left side of the spectrum since the first lazy bastard decided he shouldn't have to work.
What they don't tell you is the numbers are skewed all over the place, there is no agreed on definition of what constitutes "poor" and they usually compare wealth with income, ignore the fact the mysterious 1% pay 90% of the tax burden, and that today's poor have 50" screens.
Look, one way this number almost goes away is a simple thing. Stop the flow of 1,300 a day or so of "poor" illegals from flooding the low end of the job pool. Incomes for the lowest end will rise as will wages.