"However, to suggest government policy is the primary cause of high housing prices "
Says who?  The vast majority of 'critics' do not; it is a factor.  it is a big factor.  is it the main factor? no.

"Recent analysis by RBC reports four factors" - and the writer proceeds to squeeze apples for OJ...

yadda yadda yadda... and she ends up on "there is no land shortage because you could just cram yourselves into tiny condos/apartments".  

I'd mock her but this is in the Opinion aka "common sense need not apply" section.