DFM
I think you will find that the demise of MRA4 was the result of the incoming Government becoming aware of the true state of the Nations finances coupled with the knowledge that the number of people qualifying for the State Old Age Pension in this financial year and the next is assessed as 1,464,000 people. That large number being the result of the demobilisation of Servicemen after 6 long years of War.
With the Basic State Pension set at £102.15 per week HMG will have to find £149,547,600 per week - or if you prefer £7,776,475,200 per annum -just to meet that obligation.