General tax revenues are not hypothecated (= spent on the area where the tax is raised). Goes for road tax, APD, National Insurance Contributions, etc.
If you think taxes are too high, then vote for political parties that share your opinion and want taxes reduced as a matter of principle. That means UKIP or (to a lesser extent) Conservative. All the others believe in taxation as a means of imposing their beliefs and values, whether they are Labour, Lib Dems, SNP or Greens.
You could also campaign against the Government expenditure that these taxes are spent on (benefits, bank bail-outs, universal health service, state education, defence, the EU, and the other stuff governments waste our money on).
Personally, I'd rather spend my own money than give it to Government to spend. If you think otherwise, expect everything possible to be taxed.
