How about a Tax Control Bill. The reason why housing is too expensive is due to out of control taxes and spending.
If they solve that problem, they can work on a Poop Control Bill, a Homeless in the Streets Bill, an Illegal Immigration is Killing Us Control Bill, a Hollywood Control Bill, and etc.
All Rent Control does is create slums, when the property owners cannot make enough money to keep the properties up they abandon them, then they become dens of drug infested gang hideouts................
There, fixed it!
Primarily it is due to extreme land use restrictions. There is nowhere to build except if tearing down something already existing.