Just speaking to a friend of mine for work purposes - clever economist professor kind of thing.
He said soaking the rich doesn't work in terms of raising much money because there are relatively few of them (so far, so ho hum) BUT that there is a theory that a pound is not worth the same to everyone. A poor person values a pound far more than an average person and they value it far more than a wealthy person. So you can tax the rich more before they start to feel it.
I like this theory - admittedly probably because I am not rich, to be fair. Just wondered what everyone else thinks - do well-off MNers think they value every pound in their purse as much as people who have to budget VERY carefully?