Some people do manage to extract peculiar conclusions from a short post. Where did Jane say that people should not pay a fair tax?
Of course everything would be perfect if everyone paid a fair amount of tax. That goes without saying, like saying that everyone should put all their recycling into the right bin, refrain from snogging the au pair and be nice to their neighbours. No need to make a solemn policy statement of it.
The OP suggested that all income and the tax paid on it should be in the public domain - that is we should all be able to see it, not just the taxman. It could be a great leveller, but somehow I don't see it happening. Too much chance for comparison and envy.
And how would we know that someone is only paying 10% of their income unless we knew exactly what that income was and what proportion of it they paid different rates on? Questions shoukld be asked by the taxman if that is the case, but no-one else can ask the question.