Morals. I believe in morals. I believe in the traditional western morals, they might be said to be roughly Judaeo-Christian though I'm not religious. I believe theft and murder are wrong. These principles are important enough and universal enough to be enshrined in English law.
I believe in the rule of English law. I believe if the law says you must do something, you do it unless some very heavy circumstances prevent it. I believe equally strongly that is if the law does not say you must do it, that is because whatever it is is either not important enough or not universal enough to be worth legislation. Therefore, whether I obey the said principle is down to personal beliefs. Mine and not some number-chasing journalist or self-serving politician, people I generally wouldn't trust to hold my car keys.
In this particular instance, it is open to every one of us to pay more tax than our tax bill. We can refuse tax rebates. We can bequeath money and assets to the government on our death. People have done this and probably some will be doing it right now.
Before we criticise tax avoiders for not gifting money to HMRC, maybe we should look ar our own financial affairs and cancel our ISA's, as they are also a tax avoidance scheme, and remember back to all the tax allowances we've benefitted from abd pay them back, and root our our Wills and ask ourselves if we couldn't leave the NHS a little cash?
But I think we should be free from being accused of having funny morals if we don't.