Prudence must die?
Top of the in-tray for the next Chancellor - who'll probably be - is a momentous decision of absolutely no interest to most of the electorate.
It is whether to amend Gordon Brown's cherished sustainable investment rule. Yawn.
That's the rule which limits the national debt to no more than 40 per cent of gross domestic product - and was put in place by Brown in 1997 as part of his plan to prove that Labour could be trusted as steward of the public finances (all previous experience of Labour governments to the contrary).
If you're still awake, here's why this matters.
Unless the ceiling is raised or the rule is made more flexible, there will be severe constraints on the ability of the public sector to invest in new infrastructure - because, after years of splurging by Brown, the national debt is uncomfortably close to that limit.
One pressing case of a massive transport project that currently can't be approved because of the sustainable investment rule is - the hoary old proposal to link east and west London with a new train line.
The business community wants Crossrail. The London mayor wants Crossrail. Tony Blair wants Crossrail. Even Gordon Brown has indicated support for it and the is working overtime on its financial viability.
But it could require about ÂŁ16bn of borrowing, of which more than half would end up on the Government's balance sheet, even after employing the most creative accounting techniques (a couple of billion could for example be dumped on , which remains outside the public sector for accounting purposes).
The Treasury has calculated that giving Crossrail the green light would bust the sustainable investment rule, no matter how the books are fiddled.
Now if there really is a need for Crossrail, it would seem nuts for it not to happen simply because public sector debt could end up a bit above 40 per cent of GDP.
But on the other hand, Brown's vaunted "prudence" in management of the public finances is already seen by financial markets as half-dead and on a life-support machine. Breaching or amending the sustainable investment rule could be seen as the switching-off of the oxygen pump and removal of the feeding tubes.
So it's a tricky one: fiscal virtue versus investment to sustain London's international competitiveness? Death for prudence or a new trainset for the fat controller?
Whatever's decided will say a great deal about the priorities in Brown's Britain.
PS I'm away for a few days, so probably won't be posting again till early June.

I have in the past made the appropriate conflict-of-interest disclosure: I am a lifelong supporter. But what follows, I hope, will not be tainted by the emotional investment I’ve made in the club over many years.
But then there is a Wenger factor. Everyone I’ve spoken to says that the sine qua non of future footballing and financial success is that the Arsenal manager stays at the club. Which is why there is widespread anxiety that his contract ends at the end of the next season.
Confused? Well I think what has happened can be paraphrased as “careless talk costs big money.” BA has completed an internal enquiry and has come to the conclusion that certain unnamed employees said things to competitors that – under rules to prevent collusion and price-fixing – shouldn’t have been said.
A quartet of private equity giants tried to buy the supermarket group a . But they failed - largely because some of Sainsbury’s founding family thought the offer was too low.
Reuters’ editorial principles of integrity, independence and freedom from bias are world renowned. Those principles are guaranteed by the structure of the business - which prohibits any individual from owning 15 per cent or more of the company. That prohibition is being waved for the Thomson family, which will end up owning 53 per cent of the enlarged business.
Well part of what the prime-minister-in-waiting proposes is giving MPs more power over public appointments. Which again seems appealing.
He has opened thousands of new rooms and expanded employment. Along the way, a fat profit has been generated for its first private-equity owner, Permira, which sold out in August of last year. And its new owner, Dubai International Capital, is backing him in a second three-year growth spurt.
2) He is paying a very steep price for the misjudgement of lying to the court. Not only is there the loss of up to ÂŁ15.5m of remuneration from BP, but it will damage his future employment prospects. In a world where companies are obsessed with their public reputations, he will no longer be perceived as the prize he once was.
And the main reason for his resignation appears to be his embarrassment that he lied to the courts when attempting to obtain an injunction to prevent publication by the of an interview with his former boyfriend, Jeff Chevalier.
Kate Moss, giggling in a long red dress stamped with her new retail brand, watched from behind a pillar in a state of some considerable nervous excitement. This was an image of our times.
Moss doesn't actually design the kit. But she says yea or nay to everything that bears her moniker. And the real designers told me last night that she has an exceptional eye (which they would of course say, but I am minded to believe them). They say she makes a contribution well beyond the power of her name.
But, for now, Green is as ebullient as I've seen him since he trousered his ÂŁ1.2bn dividend a couple of years ago. The Green-Moss partnership is certainly an odd one, but on the evidence of last night they are both committed to it.
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