And why blame just the property owners? Presumably if no one was willing to pay the rents they would have to come down -- but some "predatory" renters are willing to pay to get what they want.
However, I think that a renter who pays an exorbitant rent when a cheaper yet still liveable alternative is available is partly complicit.
I work for myself, but in the hypothetical situation where I worked for somebody else, no, I would not offer to take a lower rate from my employer just because it is more than I need. I am entitled to every single penny that my employer makes from my labour. The difference between what he makes from it and what he pays me for it is capitalistic exploitation. It is in the interest of justice that it be minimised.