A headline on the UK news talked about complaints that the government is using an additional 3500 soldiers to help with security at the Olympics. Why complain? The security seems crucial; and given that the soldiers are being paid anyway, and were not going to be deployed elsewhere, the opportunity cost of their time does not seem very high. (I’m assuming that the British Army is not maintained permanently larger for use in security in such events.) This seems much more efficient than hiring some temporaries for security, who might not be as well-trained and who would require pay.