Make sense, rich people would have an easier time to immigrate.
But how many of this dozen are here on TFW like you're suggesting?
I'm doubtful that it's TFW that are buying the properties you're concerned with, especially since they're still at the mercy of PR/work authorization laws that could make them leave the country at any time.
It _could_ happen, but that would be pretty exceptional. You want to complain about foreigners making house prices too high for you, you do you. Just be accurate in your complaints.