For many smaller communities, the transit infrastructure may in fact be buying a bus.
For example, we had a presentation at the session that I mentioned, organized at the Chateau Laurier last year by CUTA, from King County transit in Nova Scotia. They are providing a transit service that is almost entirely rural. The only capital assets they have are their buses. In that case, using grant money or gas tax money for that rather than for building rail lines or stations or busways or other fixed infrastructure facilities has to be accepted as a way of meeting the needs of those smaller locations.
As I mentioned, for some communities that need to have some basic transportation, a highway bus, or even a transit bus, is too large to meet their needs. That's a case where some collaborative efforts with taxi services and school buses and so on may be another approach.
But in every case, yes, fairness is needed. The fairness can be on a pure per capita basis, or it may be weighted to recognize that the smaller communities need a little more than just a per capita share in order to do something, or it could be, as Ontario decided, a weighting based on transit use. Those municipalities that had a higher level of transit modal split would be entitled to more of the gas tax, for example, than communities that had lower transit use.
There are different options, but I agree with you that fairness is important.