I begin by drawing attention to the efficiencies in the pooling of longevity and investment risk that collective funded pension schemes provide over individual defined contribution (IDC) pension pots in guarding against your risk of living too long. I then turn to an analysis of those collective schemes that promise a defined benefit (DB): an inflation-proof income in retirement until death, specified as a fraction of your salary earned during your career. I consider the concepts and principles within and beyond financial economics that underlie the valuation and funding of such a pension promise. I assess the merits of the ‘actuarial approach’ to funding an open, ongoing, enduring DB scheme at a low rate of contributions invested in ‘return-seeking’ equities and property. I also consider the merits of the contrasting ‘financial economics approach’, which calls for a higher rate of contributions set as the cost of bonds that ‘match’ the liabilities. I draw on the real-world case of the UK’s multi-employer Universities Superannuation Scheme (USS) to adjudicate between these approaches. The contrasting investment strategy of London’s SAUL pension scheme, the objectives of the Pensions Regulator, the significance of the Pension Protection Fund, and the decision of Trinity College Cambridge to withdraw from USS to protect itself against being the ‘last man standing’, all figure in the discussion.