So, instead, I'll repeat a point made by James Kwak, a silicon valley entepreneur and co-founder of Guidewire Software Inc, he's talking about estate (inheritance tax) but I believe it demonstrates the psychology of the entepreneur pretty well:

Like most Silicon Valley entrepreneurs, when I started my company, one of the motivations was the small chance of someday making a lot of money. Back in 2001, none of us looked around the table and said, “You know, I would work really hard at this startup, but since I’m going to have to pay the estate tax if we’re successful, I’m just going to phone it in.”

So, if any budding entepreneurs happen to be reading; Do you think you'll be packing it in simply because if you succeed to the point where you earn over £150K you'll end up in a higher tax bracket?