Highers earners in the UK pay the highest rates of tax in the western world.
UK Low and Middle income earners pay some of the lowest rates in Europe. This is due to the 20% band in the UK and becomes you dont pay tax on the first 12k in the UK. In other countries income tax kicks in on the first euro you earn and they pay higher rates than the UK.
Suggest you google income tax thresholds across Europe.
Belgium - 25% from 1 euro, 15k euros is 40%
Portugal - 13% from 1 euro, sliding scale, 21k euros is 37%
France - 11% from 11k euros, 30% from 28k euros, 40% at 80k euros
Spain - 19% from 1 euro, sliding scale, 37% from 35k euros
Italy - 23% from 1 euro, sliding scale, 38% from 27k euros
Sweden - 0% to 50k euros, at 60k euros its 55% depending on municipal income tax
UK, - 0% to 14k euros (converted), 20% at 14k euros, 40% at 60k euros, 120k euros its 62% marginal rate, 150k euros its 45% tax
If you are a low or middle income earner you pay much less tax.