@ossobuco,
I think it's quite telling that the two democracies who are talking about military action, are those who don't need parliamentary approval to go ahead, France and the USA.
If Obama and Hollande had to go through the same process as Cameron they might end up with similar results.
Actually I lied, strictly speaking the UK does not need parliamentary approval, but since Iraq, it's inconceivable that any prime minister would dare to act without it.