Did your son have the benefit of a public education? Did you receive child benefit while he was growing up? Did you do extra mileage on roads to complete school runs? Because, if he/you did, I and countless other childless people helped to pay for that. So yes, I expect a certain amount of his income to go back into the pot -- I want my investment back into the social services that I, as a childless person, will be more likely use (like end-of-life care and the NHS, as it's unlikely I'll have family to take care of me).

You have to be making nearly double the median national salary in the UK before taxes really start digging into your wages, and even then, those taxes are paying for services you're using. 'Fleecing' is a bit of an exaggeration.

I'm an immigrant to the UK. The Home Office charged me an NHS fee on top of the taxes I already pay. My final visa was £3000, despite the fact their costs are about £300. That's fleecing.