It's true, this is one of the things that is desperately needed in British politics. That the left will actually start looking at the evidence of what works rather than what they desire might work.
For example, regulation almost always simply benefits the largest incumbents.
And yes, high tax rates really do make some people flee the jurisdiction.
This might not be the most surprising number ever.
Why do politicians prefer cap and trade over a carbon tax? Because cap and trade offers greater opportunities for politicians to meddle.
More dystopian writing from The Guardian.
And finally, the first line here shows why economists are different.