But unless MTC is concerned with the operations, you cannot have decent outcomes. If BART has an over reliance on fare but MUNI doesn’t, a single agency would be better able to balance the budget. Similarly if one agency is spending more of the state funding on creating new routes while other is spending more on creating more frequent service on existing routes, MTC won’t be able to direct what needs to happen. If BART is running more often, but the bus I take to the BART station just cut service, I’m not taking BART anymore.
Point of a single agency is not just to collect taxes. It is to make sure there are better outcomes, so that when you do need more taxes to fund public transit, you don’t get the pushback from the public.