If people living in the GTA could choose between more affordable housing and less greenspace,  we would see more detached homes.  Solving this is now a generational issue beyond any politician's term but the debate needs to become public.   It is pushing people away or lowering their standard of living if new detached homes are hitting the market at $700k to $1m as you indicate.   However,  we will also have to endure the shrill cry of the tree-huggers who wrongly assume we mean to pave all parks.  "Balance" is a word they will struggle with.