So, this is true, and after acknowledging this. I find it very hard to buy into the stuff about the 1%, because to the rest of the world I am (and my kids are) the 1%.
However, having said that, I do notice the "shut up, you're doing better than before" argument is only ever used on those at the bottom of the heap asking for more equality. No one ever seems to use it to respond to people complaining about progressive tax rates on the wealthy for example, despite it being even more true for them.