UK Defence Secretary Quits Over Funding, Debt Reality Bites

The fight centres on the Defence Investment Plan. Healey asked for at least £18 billion in extra military funding through 2030, according to his resignation letter. Military officials have warned of a £28 billion shortfall over the next four years. The Treasury's proposed plan would lift defence spending to roughly 2.68% of GDP by 2030. Military planners say that is too low given Britain's global commitments. The government delayed the plan for months because the Treasury could not find the money.

Britain is trying to maintain a military footprint from Eastern Europe to the Middle East, lead NATO Arctic initiatives, back Ukraine indefinitely, and modernise its forces – all on an economy that has been weakening for years. Governments typically expand obligations during good times and discover, during a downturn, they cannot pay for them.

Healey's exit lays bare a deeper problem. The question is no longer how much Britain wants to spend. The question is how much it can afford. As the sovereign debt pressures that have built across Western economies deepen, other governments will face the same choice between ambition and arithmetic.