Right to whinge

As a person of British descent, and an ex-soldier to boot, I figure I have a right to whinge. The bleeding-heart neo-liberals seem to get a kick out of it, with their global warming this, and no nukes that. Why not a whinge from another part of the political spectrum?
One thing that really ticks me off is the black hole into which my tax dollars seem to pour. Apparently, the govt. has this general fund, into which our taxes go. From this fund money is drawn to pay for Defence, police, roading, and other such. One problem I have is that the distribution seems to be according a ouji board or some such. My other problem is that some taxes are supposed to be for specific purposes, but they go into the general fund anyway. For example, I believe the tax that's added to our petrol is supposed to be for roading, while those with diesel vehicles pay road user charges. Now I don't see how a vehicle's fuel type effects how much wear and tear it dishes out to the road surface. Why not take the tax off petrol and fund Transroad with road user charges based on vehicle weight and mileage? Most of the admin is already in place.