This is a creepy idea, being floated about in Alberta. First the Homeless, then...?
I suspect that this is a repeat of what happened with the Gun Registry. As you may recall, Honeywell, CGI and other IT firms that run the Registry donated heavilly to the Liberal Party. For their 'investment', they got a piece of that $2B porkbarrel. The Canadian Association of Chiefs of Police is also 'sponsored' by GCI (and companies like Taser International) and, in exchange for the dough, acts as a paid lobbyist. I see social workers and social agencies assuming the CACP's role, here. There're maybe 5,000+ homeless people in Alberta, which would provide a decent chunk of money to whatever PC Party donor lands this ID car system contract.
The scary thing is this will not stop with 'just' homeless people. Alberta already had the disastrous privatisation of its Registries, with all the security issues that entailed. Now, there's even going to be a body armour registry, and God knows what else in the works. Alberta has never been much of a libertarian province, but things are getting worse under this PC government.