All taxation is theft, and we already have a very progressive tax system in this country. The fact is that the wealthy already pay far more than they ever did towards the public coffers.
As you grow older you will realise that they can NEVER collect enough revenue to fund everything activists and government want to fund. It is not the funding, it is the very notion of removing market price discovery that make public finances an unsustainable huge black hole.
I recommend that you do everything you can to shield your income from taxation. Defer it; max out your tax-advantaged accounts. Seriously consider if you want to pursue a high-flying, high-stressing career just to pay 50p in the pound vs leading a simpler, easy-going life with a more modest income. F%$k 'em, your duty is to look after your own, not your neighbour.