I think I'm following, but a few clarifications:
BIA levies only apply to member businesses, but yes I get the analogy.
I mentioned the transit DC specifically, because under the current way the long range financial plan (LRFP) is set up the DC is intended to fund the growth of the transit service to the area whereas the property tax levy is to fund operations and maintain the current level of service. It makes sense it's less in the rural area now while the level of service is lower.
DCs need to be backed by studies and plans, which are subject to provincial scrutiny and approval if I am remembering correctly.
It might be easier to pivot to finding growth via property tax levies (which is what I think you are suggesting) but I don't know the details of what it takes to change the LRFP, but I imagine the province isn't going to jump in an say they need to lower taxes. Because that doesn't help developers 😉
I'd personally love to see Ottawa increase rural transit, it's been a real treat to be able to drive to the southern end and take the train in 🚇
(Eta: I hope this doesn't come across as arguing, I am just excited to discuss Ontario municipal structure lol)