The counter argument being that if you get investigated and HMRC see a regular outgoing payment of the same amount regardless of income or liabilities, they will decide it's actually salary and treat it as such.
It may be legal but is it advisable? The whole trick to avoiding investigations is not to do things that draw attention to your company.
Incidentally I always thought the best place for a war chest is in the company. You are legally obliged to trade solvently and you really don't want to stop paying a salary just becasue you're on the bench for a few weeks.