Many of the investor class had the first mover advantage where they simply bought a house before everyone else and can now leverage those gains into more investment/rental income property. Couple that with foreign investment. Couple that with home equity and margin loans. Couple that with the private sector collecting houses. Couple that with mortgage fraud where people don’t pay investor taxes and continuously buy homes as a first time home owner. Couple that with with all kinds of things. I know a home owner that owns multiple homes, stopped paying taxes on one and had a tax lien discharge. They go on to sell that other home at profit and pay off the IRS. They never took the hit on their first home in any way. Multiple ownership is a problem, period.
We finally end up to where we are today and the only powerful entity that modulates this is the Fed, but not a single politician is taking up the battle over the fact that the multiple home ownership is killing our society at the moment.