The primary purpose of the government should be to govern. It isn't. Democracy & party politics means that the primary purpose of the ruling party is to get re-elected.

The 5 year fixed term stops the government from fiddling around calling an election that suits them best; when they're doing well in the polls, when something has happened that makes them popular (Milk-snatcher & the Falklands springs to mind), when they've just tried to bribe the voters. It's a measure I thoroughly approve of & one that should have been brought in years ago. I'm astonished that this aspect of it doesn't seem to have occurred to you.

And I presume your EU comments are directed at Steve, since I never said anything about it.