This week, the Chancellor of the Exchequer, Sajid Javid resigned.
A few hours after the announcement, Gary sat down with Lord Nick Macpherson, who ran the Treasury as its Permanent Secretary for 11 years under Labour, the Tories and the Coalition.
He was also joined by Torsten Bell, Chief Executive of the Resolution Foundation, who was once a Treasury civil servant himself and then special adviser to Alistair Darling when he was Chancellor.
The full discussion is available wherever you get your podcasts, or watch it in full on YouTube.