As the healthcare debate picks up in the US, there has been much discussion about how to pay for it. Coinciding with this debate are vocal concerns about the country's underlying fiscal position – which some have suggested as a reason to delay healthcare reform.

What this argument ignores is that healthcare is central to the long-term fiscal and economic prospects of the US. If costs per enrollee in Medicare and Medicaid grow at the same rate over the next four decades as they have over the past four, those two programmes will increase from 5 per cent of gross domestic product today to 20 per cent by 2050.

Healthcare cost growth dwarfs any of the other long-term fiscal challenges the US faces. Nothing else we do on the fiscal front will matter much if we fail to address rapidly rising healthcare costs.