No one would voluntarily agree to pay more tax. That's why we need politicians with balls to actually impose it. Go right back centuries and people bricked up some of their windows to reduce "window tax".
Trouble is for 2 or 3 decades, politicians have actually encouraged "tax avoidance", i.e. tax breaks for this, that and the other, ISAs, tax relief on pension contributions, tax breaks for film partnerships, new savings tax allowances, £1k tax free interest, £5k personal savings allowance, etc etc. It's given the impression that they're encouraging people to reduce the tax they pay!
Then you add in complexities like Brown fouling up small business taxation and "encouraging" window cleaners etc to incorporate limited companies to save tax - just sends out the wrong signals to people.
Like increased IHT thresholds, the relatively new residence nil rate band, etc - just giving the green light to people that they don't need to pay IHT when the threshold for a married couple hits a million!
There's been absolutely nothing from any politician over recent decades that paying tax is a good thing. It's all been about reducing taxes, increasing allowances/exemptions, etc. When entire generations have heard nothing else, it's no surprise they think tax is bad and will take actions (legal and illegal) to avoid it.