Obviously, Great Britain needs an airport in the Thames Estuary like a hole in the wind farm, but you can't deny that it is a BIG IDEA. Stupid, yes, but BIG.
In its way, this is of a piece with the bicycle hire scheme and the new Routemaster buses. Mr Bojo may be CLOWN PRINCE of LONDON, but he's not interested in MANAGERIALISM. He wants to DO things, CREATE things. In the HORRID modern parlance, he's got his eye on the "LEGACY".
And this may be the key to his SUCCESS. Well, that and the "loveable" bumbling buffoon persona!
(Something he has in common with his arch-enemy Mr Livingstone: they're both very clever men who know that people don't VOTE for very clever men, so both have successfully concocted "personalities" to hide how much of a smarty-pants they are.)
The arguments for a new airport for London appear to be of the "you've got to build bypasses" variety that gets Arthur Dent's house knocked down in "The Hitch-Hiker's Guide to the Galaxy". And, in case you missed the point, then gets the EARTH demolished too.
(One of the OVERLOOKED arguments in favour of the new High Speed rail link being extended to Manchester and Leeds is that it would REDUCE the numbers of environmentally catastrophic short-haul flights around the UK, easing pressure at Heathrow as a lucky consequence.)
But in the middle of all this on-going global economic gloom, a "GRAND PUBLIC WORK", something magnificent and mad and ever-so-slightly-Victorian has the ability to GRAB the public imagination in exactly the way that a shiny new written constitution DIDN'T!
And we need something like that, something so that people will say "oh, THAT'S what the Lib Dems are about".
Would a new Federal Parliament (subject to Mr Salmon losing his referendum) be too much of an indulgence? Yes, I suspect it would… but we could hold a competition for which city would host it. Mr Graham Norton could host "How Do You Solve a Problem Like West Lothian?"
Or perhaps a more local approach, with a free gift to every council for a bit of CIVIC PRIDE, whether it's putting LOOS in all the high streets or refurbishing all the Victorian Spa Baths so everyone has a swimming pool or just BULLDOZING those IDENTIKIT high streets and rebuilding something with character.
Personally, of course, I'm in favour of a BRITISH SPACE PROGRAMME. We're so very keen to encourage our young people into SCIENCE and ENGINEERING and Mr Professor Brian Cox and his Wonders of the Universe and Stargazing Live, space is as popular as it's ever been. A Space Programme would be encouragement and training all in one, with new technology being developed with who-knows-what side benefits.
Plus, I'm sure that the prospect of sending Mr Professor Brian into space so he can "ooh" and "ahh" from orbit is one that would appeal to millions.