Yes, I would happily vote Labour, and pay more tax, if I earned 80k. I currently earn a high wage - albeit not 80k high - and would pay more, for the benefit of society. Because I'm not a selfish knobhead.
OP, you may feel "normal", but - as PPs have pointed out you are in fact extremely wealthy when compared to average. I suspect you live in a middle class bubble where you think holidays, car ownership, meals out, new clothes etc is the norm.
I see people like this all the time. "Oh, I'm not wealthy - we only go on holiday to Anglesey." "Our car is 10 years old." "We only eat out at Pizza Express, with vouchers." "We buy new clothes from Sainsburys."
They think this stuff makes them somehow average, or thrifty even. Erm, no.
I've just given a box of the DCs old toys to our next door neighbour, as they'd grown out of them. She's wrapping them up for her DD for Christmas as she can't afford to buy her many presents. She also hasn't been on holiday for at least 3 years and can't afford to run a car. This woman is a teacher. When people in good jobs are struggling to get by, due to bills and housing costs, people on 80k should count themselves lucky that they're in a position to be worrying about a bit more tax.