The Treasury wants technical and market based solutions. Economists are only too happy to advise.
But what if the problem doesn’t require money - it actually requires time or a change of practice.
These kind of approaches should be considered equally, but you have to consider that the Treasury is the most powerful organ of government.
The power of the Chancellor and the Chief Secretary to the Treasury is too often overlooked in this country, because the holders tend not to be charismatic.