Ok, higher inflation in certain sectors. e.g. "free" money resulted in housing prices growing at a much faster pace than goods and services for an extended period of time (something similar also applies to education in the US for instance)

> short selling system so that speculators can pop 'bubbles'.

Like in real estate? I mean technically, yeah it's not even really bubble in most places (obviously not China for instance). But I'm pretty sure you understand what I'm trying to say (or should, anyway)