Ultra-matrimony.

So by my calulations, under Tory proposals, the average wedding (11k, apprently) would pay for itself after only 73 years.

The actul paper work should pay for itself in a year or so, so elopement will be sound fiscal policy, but having any sort of wedding ceremony will basicly wipe out any benift until the sun grows cold.

Alternatively, by getting married 73 times, you can afford an extra wedding a year.