The boomers failed to let the next generations have any of the wealth.
So, there is no one to sell their assets to. (Except maybe the bank, and their buying unit, BlackRock)

Most important part; it is all about incentives - but sadly noone seems to recognize that, but why should anyone being paid not to?

also they do not really own anything, they basically already lived the "you own nothing and will be happy" by financing their whole life with credit
all the houses are already owned to some part by the banks..

AND

without that property/ownership, they also cannot pass on/ transmit/ inherit (hope the right word) to their children, which is seen again (basically doubled the impact) in inheritance tax