There is no evidence that free milk for under 5s makes any significant impact on their diet and nutrition and in any case it is a blanket subsidy that is not targeted on those in most need. Given the current fiscal climate, it would be a good way of saving £150m a year.
However, David Cameron quickly knocked down his health minister when she suggested getting rid of the free milk. No doubt he remembered the 'Thatcher the milk snatcher' that attached to Margaret Thatcher for so long. That was in part because it rhymed and someone actually made a song of it. I was reading a compilation of remniniscences the other day and it was pointed out that the milk was often in poor condition when it reached the children. Its original introduction in the 1930s reflected the power of the dairy lobby.
What this episode shows is the risk that relatively ineffective programmes will survive the cuts and more effective ones may take the hit.