What a ridiculous circular argument this author makes: that the restricted supply of a commodity,  low density single family housing, drives up prices of them, but that people don't want to produce or buy her preferred alternative commodity, high density housing, so there's no need to allocate resources to build the low density stuff.  We have plenty of townhome, laneway house and condo developments in the Vancouver area and they aren't holding prices down at all. The answer is to free up land and put more product supply on the market - either that or learn to like the idea of a rich people only city.