Owning a house and renting it out to help finance your retirement, is one thing. Buying all the available property in an area, thus driving up prices so no one can buy a home of their own and so that you can charge whatever the hell you want, is predatory, and the kind of thing that the extremely wealthy can do. I mean, hell, even Orange Man has been talking about preventing corporations from buying up residences, so you know it's got to be bad.
Meanwhile, when business gets in bed with government, it creates situations that are only good for the business and very often bad for the people. The military-industrial complex, for instance. Elon Musk, or Palantir, etc.