The major issue of debate! Strange then that a very straightforward point escapes so many commentators.
And here's another point, seeing you started it. Y'see, proponents are understandably as keen to downplay the cost (£31Bn) as opponents are to inflate it (£160Bn). Here's a question for Nicola who likes the convenient round £100Bn pricetag - if it was £100,000, would you drop your objection? No she wouldn't. It's not actually about the money.
Strange then that we'll happily go along with the NATO first strike strategy and joint exercises with nuclear armed forces.
Maybe it's not about morality either. Perhaps it's just the same old playing to the gallery for votes. Still, that's democracy.