Myths about cycling, busted

To describe it as squandered elsewhere is a bit disingenuous really. Is providing a free national health service squandering? or a emergency fire service, or a core of social services working to prevent child neglect and abuse? It's beside the point, there are a number of key and essential services that national and local government provide and the funding for this all comes from a central pot. Revenue from VED and fuel tax/duty all go into that central pot so you can't argue that the money that you pay on taxation and duty is spent on something you don't like. It is impossible to track that money through the system. It's lucky you can't because if you could, we as cyclists would be able to express far greater influence on road building and maintenance activities as well as the other costs of the road.
The link I posted upthread clearly shows how non-motorists are heavily subsidising motorists. You think that motorists pay heavily for access to the road but if that payment were to be considered to be equitable then it would probably need to be at least doubled or provision of services radically cut. There are credible arguments for both out there so it's probably a case of be careful what you wish for.

This is quite interesting- what are the figures on car ownership?

I'd have thought that the average family have a car, so would all count as motorists.

What percentage of people in the UK don't belong to a family unit that has a car?