Never heard of the Laffer Curve

From the UK Telegraph:

50p tax rate 'failing to boost revenues�
The Treasury received �10.35 billion in income tax payments from those paying by self-assessment last month, a drop of �509 million compared with January 2011. Most other taxes produced higher revenues over the same period.

Senior sources said that the first official figures indicated that there had been �manoeuvring� by well-off Britons to avoid the new higher rate. The figures will add to pressure on the Coalition to drop the levy amid fears it is forcing entrepreneurs to relocate abroad.

The self-assessment returns from January, when most income tax is paid by the better-off, have been eagerly awaited by the Treasury and government ministers as they provide the first evidence of the success, or failure, of the 50p rate. It is the first year following the introduction of the 50p rate which had been expected to boost tax revenues from self-assessment by more than �1 billion.

Although the official statistics do not disclose how much money was paid at the 50p rate of tax, the figures indicate that it is falling short of the money the levy was expected to raise.

A Treasury source said the relatively poor revenues from self-assessment returns was partly down to highly-paid individuals arranging their affairs to avoid paying the 50p rate.

England suffers from the same problem that we have -- there is no revenue problem, there is a spending problem. We are collecting buckets of money but we are spending it faster than we collect and this rate is only increasing. Bill Whittle says it best with this video: Laffer Curve? Read more here (Wikipedia):

Laffer curve
In economics, the Laffer curve is a theoretical representation of the relationship between government revenue raised by taxation and all possible rates of taxation. It is used to illustrate the concept of taxable income elasticity � that taxable income will change in response to changes in the rate of taxation. The Laffer curve postulates that no tax revenue will be raised at the extreme tax rates of 0% and 100%. If both a 0% and 100% rate of taxation generate no revenue, but some intermediate tax rate generates some tax revenue, it follows from the extreme value theorem that there must exist at least one rate where tax revenue would be a non-zero maximum. The Laffer curve is typically represented as a graph which starts at 0% tax with zero revenue, rises to a maximum rate of revenue at an intermediate rate of taxation, and then falls again to zero revenue at a 100% tax rate.