Two thoughts: not picking on this post in particular, but it is representative for me
"We both have good jobs but its not luck, we both have middle class parents who paid for our private schools, university education and guided us to getting good jobs."
I feel very differently - I didn't go to private school, but I feel that I am incredibly lucky to have had involved hardworking parents who made sure that I had a good state secondary education, encouraged me to go to university and made it possible for me to get a good job. I can't see any reason why I deserve to have massively more money and opportunities in life than my friend who was abandoned by his parents as a baby & grew up in and out of care/foster homes etc.
If you have had the good luck in life to have received a good education and be in good health, it seems to me that you do owe something to those who aren't doing so well.
Second thought - maybe what we need to worry about is not tax rates, but wage inequalities. If wages were more equal (or at least less massively unequal), then there would be less need for redistribution.
Its hard to get definitely comparable figures because of the various taxes (central/local income tax, social security contributions etc) but I'm not sure that the UK tax rates are massively lower than those elsewhere in Europe.
We do, though, have vastly more unequal pay rates than most other western European countries.