[BearGoesChirp]

Is that possible?

The good landlords aren't pulling out every technically not illegal trick to make more money because they value things more than just being in the clear legally, but they do value being in the clear legally. The slimy landlords don't care about other effects, as long as they are legally in the clear. If you increase punishment/enforcement of the laws, you will hit both the good and the slimy landlords harder, with the slimy ones still taking a lead because they don't care about factors like a good reputation or having a clean conscious (yes, I'm somewhat stereotyping the good and slimy groups).

That the slimy ones know and practice working around the law may even mean that the good landlords get hit harder from a crackdown. In some way the government can't focus on the slimy landlords because by their very being they avoid government focus more than the good landlords.