This Korean system should work in theory. People generally don't move very frequently. As long as there's a liquid market for investments in stocks & bonds, and the housing appreciates in value over the long term, it's not a bad system.
Seems pretty favorable to the landlords too. They get $90k up front for a $100k house. Which they could invest for an 8% or so return, which, in the first year is ~$550/mo in rent, compounded each year, minus maintenance. Yield wise, $7k on a $10k investment ($100k house - $90k from renter) is fucking amazing.
The fact that is has been around for so long suggests that it works in practice too. Yeah, maybe a black swan event causes a liquidity crunch. But so long as the government steps in to provide liqudity (low interest mortgages would work), then it shouldn't hurt too bad. Worst case, foreign investors step in to buy up the real estate.
The "pool of capital" never grows here, either. Landlords get more assets (houses), but also more liabilities (deposits).
A Ponzi scheme is perfectly capable of having underlying investments, by the way. I'm pretty sure Madoff bought houses with his money, too.
> Which they could invest for an 8% or so return
Where the heck do you get an 8% return with no risk? I want in.
> The fact that is has been around for so long
How many decades did Madoff's ponzi scheme last?
And then they have to return the deposit eventually... how is this different from a Ponzi scheme? :P