When politicians say "you never had it so good" they're taking credit for something they didn't do. In truth, what economic prosperity we have is due to private savers and entrepreneurs making economic progress possible.
Gentrification gets bad press. It would appear that the gentrifier (he who engages in gentrification) is a malign exploiter, a bully, someone who takes advantage of the weak and the poor. And these are the nice things said about him.