Look at a weekday of a typical working man. Assuming 8 hours sleep they have 16 waking hours in the day, 8 of which are spent at work plus an hour in the middle of those 8 hours for lunch and then an hour either side getting to and from work. That's 11 of your 16 waking hours doing something you'd rather not be doing.
You do it of course to make money, but it's pretty common for nearly half the money you've earned to be deducted before it reaches your bank account. Then whether you own or rent there's no getting around paying a significant amount of your untaxed income on council tax. If you do buy a property that's more of your income you need to spend on tax (stamp duty). Then when you need something to be repaired you pay 80% to the builder and 20% on tax (VAT).
You also have to pay tax every year on the car you need to get you to work. In order for the car to run you need petrol which is more money on tax. You take the car to the mechanic for repairs, once again it's 80% to the mechanic and 20% on tax. Then at the end of a long boring week you want to unwind with a few beers down the pub which means paying more tax. You put some money away for a rainy day which loses value even with interest but you still have to pay tax on interest (I know you have ISAs but there's a limit to how much you put in and that amount looks likely to get reduced).
Aside from all these other ways of paying tax there's the fact more and more of us are paying 40% tax. Some say if you earn £50k then you can afford 40% tax but £50k really doesn't go that far anymore.
40 hours a week on the minimum wage will give you an annual salary of £25,396.80 so the level where you start paying 40% tax is just under twice the minimum wage.
When the minimum wage was first introduced in 1999 and 40 hour week would give you an annual salary of £7,488. Therefore the equivalent wage of £50,270 (where 40% starts) in 1999 relative to minimum wage was £14,821.62. That was by no means a bad salary in those days but it certainly wasn't a great one. The actual 40% level was £32,335 which in todays money relative to minimum wage is £109,669.50. You're being penalised in more ways than simply paying 40% tax when you reach that level.
That's not to mention that if you receive things like medical benefits at work then it's technically an additional salary that you pay tax on and can push you into the 40% band.
If more people paying 40% tax meant better services then fine. But in 1999 the bin men came once a week, it was the norm for dentists to be NHS and potholes on the road were rare enough that if there was one then all the locals would know where it was. Now the binmen come every other week and if you want your garden waste collecting that's extra. NHS dentists have now all but vanished. As for the roads, it's a novelty to drive down one that doesn't need repairing.