People using words like "prosperity" either don't live here, or especially don't work for a living here...
This sounds like AirBnB effects again :(
the major downside of globalization is you're no longer just dealing with demand from the local region
That, and the fact that the government has decided to keep giving away EU visas to people from geographies that are notorious for corruption (e.g. Brasil, Angola, China) in exchange for meager (500K€) real estate "investments" [1]