Part of the problem is how we even measure "poverty".
What we call "poverty" today is nothing like the reality of poverty 50 years ago. Much of the problem is that we've made poverty not only survivable, but actually somewhat palatable for large segments of our population.
In fact, in more "progressive" countries, it's now possible to live what is arguably a first-world middle class existence entirely on the dole.
It's not just that the rich have gotten too comfortable. We all have.