And comparing minimum wages in different countries is really pointless.
In general, UK has very high living costs, lowish wages and high taxes. it is the combination of these 3 which is unappealing. Other countries like Switzerland do have slightly higher living costs but you get a much better quality of life and service provisions so it doesn't bother anyone, and in Switzerland you get much lower taxes and higher salaries to offshoot these costs.
Some counties have slightly higher taxes, but again there are improved services to show for it.
Other countries give much higher salaries.
One of things regarding UK taxes which often slips under the radar because people talk about the head line top rate of tax is the cut-off points for the different taxes.
Even if a 40%-45% tax rate is lower than some countries (but still astronomically high really). the things is far more people enter the 40% tax band than they would in other countries. And this is true at the lower tax bands. In the UK you start paying more taxes sooner on the pay scale.
Inflation and salaries have increased faster than the cut-off values of the tax rates. This is a classic stealth tax approach. Despite not raising a a tax-band % and claiming no tax rises the tax free allowance and cut-offs don't rise resulting in increased taxes.
Same is true for many things like council tax where everyone is gettign into the hitop tax bands. Inheritance tax is another, the cut-off has not increased with house values or inflation.