and it STILL sounds like an absolute bargain
So even if we take the lowest figure cited, that coughing £28Bn will "only" increase GDP by 0.1%, where does that leave us?
Well the UK's GDP stands at about 1.5 TRILLION pounds, so one-tenth of a percent comes to £1.5Bn. But that's not a one-off increase - it's every year. So the country would be "investing" £28Bn and getting an annual return of £1.5Bn - just over 5% - less than it would cost us to borrow that amount. In addition, £28Bn would add somewhere in the region of a quarter of a million job*years of employment, assuming whoever got the contract was able to take registered unemployed people, rather than bring in immigrant workers, thus reducing benefits costs, too. Finally, most of those billions would be spent in the UK - not spent on buying imports, so it is essentially money going round in a circle. The people who earn a salary from being employed on pushing out BB, will pay taxes and buy stuff with their pay, so a large proportion of it will either go back to the exchequer or will boost consumption for other goods - a small fraction of which might even be british-made.