So, we have a Fiscal Charter that sets out a promise that this government plans to shrink the UK economy in perpetuity.
And which promises that however good an investment will be for the UK the government will never undertake it if it involves borrowing.
I noticed my friend Danny Blanchflower calling on George Osborne to list all those serious economists who think these are good ideas last night.
I think this would the first of the serious challenges George Osborne faces with this Charter, although I suspect he will not deliver to Danny.
The second, more serious challenge will be in trying to deliver the surplus the Charter demands.
Much more worrying still us the damage Osborne will cause when trying to do so, most especially if the UK does face an economic crisis between now and 2020.