I do think an important part to mention though is that during the Metro era even though the Subway was expanded beyond the City of Toronto (as well as the TTC becoming responsible for bus service in Metro), the 5 other municipalities contributed to the TTC's annual operating budget. A portion of every municipalites property taxes went to Metro who used it to fund 1/3 of the TTC's operating budget (among other things), while the other 2/3 came from the Province (at least by the 80's that's what the split was). So while Scarborough, North York, and Etobicoke got their subway extension they didn't get them for free and helped pay for the operations. As far as I am aware York Region doesn't contribute a single penny to the TTC's annual operating budget, so as I see it they are getting a free ride since they get these extensions while Toronto foots the bill every year. The ideal arrangement would be for municipalities that want the subway should have to contribute a percentage of there budget to the TTC, what that percentage is is for the bean counters to figure out, but there was no free rides during the Metro days and their shouldn't be any now.