The bottom line is that either we have crap public services, crap health outcomes and crap everything.
Or those who can work do so, and don't expect to be funded to work part time if they are not disabled/ have caring responsibilities, and that low and middle earners accept they'll need to pay around 10% more tax than they are doing.
Capital gains taxes should also be raised to be equivalent to income taxes. That would help a bit to make the genuinely wealthy pay their way, but ultimately there are not enough of them for that to fund what people want.
Higher earnining PAYE employees (£50k-150k) are taxed to death already (actually more than in most of the countries mentioned) and have carried everyone else for 15 years.
So if people want change, they need to accept they will work and they will pay much more tax than they are now, not expect everyone else to. Plus also probably lower tax free allowance back to £5kish.
Will they do it? No. Because it's always "oh I'd happily pay more tax", or as with Brexit "it's worth being poorer" but what they mean is that someone else should foot the bill.
The UK will continue to decline unless all people start to take responsibility and pay up. And it is those who truly can't work and should get far more support who suffer. And those on higher incomes are fed up and leaving because they pay Scandinavian rates of taxes for third world services. It's those in the middle that need to accept they will have to work full time and pay much more tax even if it's "inconvenient" or "much nicer to be home with the kids", if they want anything to get better or their children to have a decent future.