Housing, education, and healthcare are the big three that have squeezed the lower class for a couple decades now. I don't think it's a coincidence that these are the most heavily regulated. The politician who actually gets serious about tackling the affordability of these will have my support. But everyone, including Bernie and AOC, have been all talk.
Also, I have to push back on the bolded part. This is a false narrative. First of all it's Blackstone that buys properties. Secondly, the institutional owners of single family units are now net sellers and never owned more than around 6% of supply. The report that came out a few months ago saying something like "one group has purchased 25% of all single family homes" was talking about people who own 1 to 10 units. Mom and pop landlords.