Part of the issue is that some on the right think that 'striving to become a higher rate taxpayer' is an end in itself.
For sure, 'strive' (loaded word anyway but there we go) to earn a decent salary that will support you and yours. Strive for a job that you enjoy. Strive for fulfilment, for something useful to society. Those are things worth 'striving' for. But striving to become a higher rate taxpayer - are you serious? (I will be a higher rate taxpayer within the next couple of years, btw, so there's no jealousy here. That's the barb usually aimed at people like me, and it's laughable.)
Over the last few days I have seen many, many posts from those who identify as right-wing, clearly incapable of judging fellow humans on the basis of anything other than their earning potential. I have seen posts which very starkly and honestly state that people's usefulness to society should be judged on a ratio of number of children to monthly salary. And if the sums don't add up, that person is, well, non grata!
And that kind of reasoning has absolutely nothing to do with 'personal responsibility' or a desire for national money to be spent 'more wisely'. It has nothing to do with a desire to get the national debt down. It is not born out of some superior understanding of The Way The World Works. It is ignorance, bile, and fear. Nothing else.
Many on the left may be more idealistic than perhaps they should be. I'll give you that. We live in a deeply imperfect world and levelling the playing field is going to be tough, really bloody tough. There are no absolutely straightforward, quick fix answers.
But a society like this one is becoming, where those who can't (or indeed won't - there has to be room for them in a civilised world) maximise their means of production, can't or won't be docile lttle units of economic output, are derided, loathed, scorned and punished...a society like this one will eventually disintegrate, because humans are about more than the tax rate they pay.