Richard Murphy is a left-wing economist, accountant and blogger who has advised Brendan Barber’s TUC and Mark Serwotka’s PCS and written regularly for the Guardian. Twitter users will know that he maintains a close relationship with several tweeting Labour MPs. This morning Murphy put his foot in it by betraying the loony left’s true thoughts on the public debt:

@mocktheleft @DisgruntledRob @jreedmp There is no need to repay public debt: the demand for it has always outstripped supply

— Richard Murphy (@RichardJMurphy) August 15, 2012

@richardnorthey @MockTheLeft Give me a good reason why we should pay off public debt? Our private pension industry would fail for a start

— Richard Murphy (@RichardJMurphy) August 15, 2012

When will the flat-earthers learn…