Hoarding is not even a very disruptive process, because for every miser stuffing money into his mattress, there are numerous misers' heirs ferreting it out. This has always been the case, and it is not likely to change drastically.
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.