Poor start to that post and just got worse. It's people on £100k who will be leaving generational wealth. 20% of MPs went to Oxbridge. Why would having a degree mean you've inherited money? And pensioners were "hit" with losing £4 a week WFA while getting £45 a week pension increase in two years.The biggest problem is the perception that somebody on £100k is wealthy when it just isn't true. Of course somebody on £100k is wealthy compared to somebody on £30k but in the grand scheme of things it doesn't take much to put you in the bracket of a high earner. Somebody on £60k will be in the top 20%, it's because the richest aren't earning a salary.
Income tax isn't the problem, the problem is generational wealth, assets and property but historic governments have never touched this because they themselves are part and parcel of that system. It's a completely different world of wealth that goes beyond people who have just worked themselves into a good career or whatever.
Most MP's are Oxbridge types who are highly unlikely to need to pay their bills from their MP salary. The reason why is they already probably own assets or they've inherited money or they stand to inherit a ton of money because of who their parents were or what they did.
So why would they argue to tax themselves? They haven't which is why we've seen the chancellor hit pensioners last year but they didn't dare touch the millionaires and billionaires who own the £20tn value that is sat locked away in assets.