Wiener is really good on housing, much better than the Peskin group of Supes. Read his post when he came out against the Mission Moratorium to get a sense of his housing views:

http://www.scottwiener.com/more_affordable_housing_not_a_hou...

Alternatively, read his post on Medium titled, "Yes, Supply & Demand Apply to Housing, Even in San Francisco":

https://medium.com/@Scott_Wiener/yes-supply-demand-apply-to-...

> These trends are exactly why the supply-and-demand deniers pose such a significant challenge to actually fixing our housing problem. As we work hard to try to produce new housing — through market-produced housing, below-market-rate housing, new types of housing such as co-housing and micro-units, and more flexibility toward in-law units — we have a vocal and influential set of advocates pronouncing that we shouldn’t even bother to build market-produced housing, since, according to them, doing so won’t lower housing costs and may even raise housing costs. This argument, to the extent it succeeds, not only reduces the amount of housing produced in San Francisco but actually slows the production of below-market-rate housing, since market-produced housing, through our inclusionary housing program, is the most significant source of new affordable units coming online.