The Bank of England is buying up Gilts, on which the government pays no coupons; these gilts are not sold on the secondary market (as it would widen the deficit).
Pension funds, which have had a torrid decade, rely on bond portfolios to provide income streams - specifically Gilts and Index Linked Gilts as they are low risk (and trustees are obliged to use low risk instruments) and provide an element of income protection against inflation (as the index link is RPI).
Essentially, by manipulating the gilt market to the point where yields have been negative, they are raping and pillaging the retirements of millions of people in the name of unfunded government expenditure. We're all living longer, not saving enough and heading for a heavily skewed aged population. Add it all up and it doesn't take a CFA to realise we're heading for trouble.
One of the guys who runs a load of our mutual funds was chatting with me about it a couple of weeks ago. It's frightening - and it's not conspiracy whackjob stuff either; simple market economics.
its so obvious its frightening - the country is sooo screwed.