So what you are saying is that these places have not built enough housing. That sounds like the actual problem, not the population size.
Forget where I first saw that but it’s absolutely true.
The left will try rent control, subsidies, taxes and prohibitions against speculation, banning AirBnB, etc. The right will try mass deportations and population caps.
Nobody will build more housing because that would work, and home owners are incentivized not to do anything that would work, and homeowners vote in much larger numbers.
The problem won’t be solved until renters out vote homeowners and until everyone who wants more affordable housing stops advocating the solutions that will not work.
The entire developed world is basically a big housing cartel where existing home owners work to limit supply to keep the price high.
1. https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/...
There was this weird period after WWII where we built tons of housing. It was a major factor in building the largest middle class in human history. Then we stopped.
This is hideous, and can't really be interfaced with as a human.