Man of Honour
So a motorbike pays about half the value of a car and weighs about 1/10. Going be weight alone then should a push bike pay half the value of a motorbike as it weighs about 1/10? £30 a year seem fine to you? If not, why not?
I'd have thought that was more of an argument to re-evaluate the present costings in the interests of fairness than to introduce new ones but that's up for debate. It is also worth considering that at certain levels of weight/usage the road wear would be negligible with a further query as to where you stop the idea of taxing e.g. if an 80kg man carries a 40kg rucksack and walks along the road then should he be taxed? What is the lower weight limit on where taxation starts? 100kg? 150kg? Something different?
Basic point, and one I'd guess you'd agree with going by the smiley, is that weight alone isn't a great metric for charging. It is better to use another attribute (such as having an engine) along with weight if necessary.
Because the law isn't everything. Legally I don't have to let someone out of a sidestreet, legally I don't have to let someone get past some parked cars, legally I don't have to allow someone to pull out from their drive. You as a cyclist are asking for consideration from motorists yet seem to be not willing to give consideration to other road users yourself.
It's a bit of a difficult one, as a cyclist you are particularly vulnerable so it may be that moving to the side of the road is going to be considerate but would put you at much greater risk because the state of many verges is less than ideal. It is therefore hard to give an overall answer which covers all circumstances - personally when cycling I generally would pull to the side as much as possible to give car drivers a decent chance of passing since I want them where I can see them, I trust myself a whole lot more than I do other road users. However that was cycling in Edinburgh or Dundee - I suspect that in London I'd have to be rather more aggressive to get anywhere, you certainly do have to be a bit more forceful when driving.