All of that has absolutely nothing to do with getting out of the morass that liberals have consigned the poor into ... but, hey, if you're looking for an excuse, THAT is as good a one as I've heard lately.
You are taking a single comment, and trying to spread it like mayonnaise over everything. I'm curious ... what was the welfare package like 20 years ago? The unemployment package? The government healthcare package? The government food package? Government education packages?
If I accept - and, believe me, I don't - that wages have stagnated, none of that changes how difficult it is to move forward.
However, let's talk about your statement .... if I go to
https://www.census.gov/hhes/www/poverty/data/threshld/thresh93.html, I see that the inflation adjusted poverty level for a family of three in 1993 was $11,631, and that in 2013 it was $18,751. While I recognize that ain't a heck of a lot of money, it DOES put the lie to your statement. In addition, you fail to consider the significant increase in hand-outs, which, most assuredly, also have a value.
Now, since you brought it up, let's look at those in the 80-90% range.
File:United States Income Distribution 1967-2003.svg - Wikipedia, the free encyclopedia shows us that the average income in the 80-90% increased from $75,000 (80% in 1993) to $125,000 (90% in 2005)
So, while your rhetoric sounds nice, and makes everyone feel good, it simply doesn't pass the truth test.