drdel
Tour Rookie
Well, even the predicted 150Bn over 15 years (10Bn/year for those with no arithmetic skills!) is actually something of a drop in a bucket! UK's GDP is 2.6Trillion USD, down from 3 Trillion in 2014 - and have we noticed? Supposedly the period of austerity (since 2008's 'crash') is over, but has that even been noticeable - and with a declining GDP?
I know you like to be the oracle but there is such a thing as inflation so your arithmetic average of £10bn pa in 2033 is only worth somewhere north of £7.5bn in today's money, set against only moderate growth in the £3.5tn over the same period. It ain't worth bothering too much especially as the EU keeps raising its budget significantly higher than inflation so the rise in the UK's potential contribution could easily dwarf Hammond's number!!
In fact Hammond's paper is pretty devoid of stated assumptions on inflation.