I think £100-150K per year is far from rich, comfortable yes, but after stoppages around £50-75K
It's at the point where if you where to lose your job and don't get something else in a short space of time you'd lose your house, so not rich at all.
The day I earn £75K after tax with no mortgage etc.., I'll feel rich, but that will probably be just in time to put two kids through University and help them with car, car insurance and rent/leg up on property ladder.
I can honestly say about the "richest" I've ever felt was in the summer of 92 before University earning £200 per week with no or little tax and paying £35 per week for bed and board.
So why does someone at this level stray into 45% tax bracket, same as someone earning £1000K plus who has got an accountant to find loopholes (image rights etc..)
I look at the kids of these millionaires and don't get jealous, but I do think there are better things they could be spending their money on.