QFI Hawkman, perhaps giving up is not such a bad idea mate.
Lowering taxes does increase government revenue. The lower an individual's or company's tax, the more revenue is generated. This, in turn is spent (by and large) on the Nation's economy and thereby more money is sloshing around for all to enjoy.
Ten years ago, when the UK was a low-tax economy, it flourished (no, this is not a party-political statement) and now, when we are suffering one of the highest tax levels in the EU, I don't think we are any more...