Supply is not the issue. There are too many empty homes for that to be an issue. Unless you want to look at homes as stocks and not as an actual place to live. 

But the clear solution is to let rates rise and prices will fall. However that will destroy home owners fantasy paper wealth and not politically expedient. So Christies way is typically Canadian. Give tax payers money away, put all the risk on tax payers and then home prices won't drop, the party keeps going and all (her donors (developers and real estate cartel), home owners and presumed current renters looking to buy)  are happy. All is satisfied, seemingly. Problem is BC is not an island unto itself. US increasing rates will eventually hit us hard, either through a real estate correction or a massive drop in the loonie. So you're going to be either shelling out more for shelter or for basic necessities. Take your poison, she is just trying to delay the inevitable.