Labour threaten to tax the rich, but as such people are adept at tax avoidance they raise taxes for average earners. The Tories claim wealth creators will flee if they raise taxes, realise the poor can't pay much tax, so also raise tax for average earners. By the time defence and health spending have been taken out the pot, most claims are spin.
I personally think we have to find a third way. We can't carry on the way we are, the rich aren't going to take a hit in the pocket alone. So how are we going to do it? A lot of the very wealthy are making money just from having money. This is simply not sustainable and cannot continue and will eventually result in the super rich being left in an untenable situation. They can carry on being super rich but the world burns around them.