A couple of my colleagues have spoken to this, but I want to see if there are more points that can be put on it. There is a cost of not acting, and there is a potential fiscal cost of not acting in defence procurement or national security more generally.
In the world you occupy, of defence economics, in particular, how do they think about that? Even if it isn't something they would publish with numbers, can you talk to us about how those kinds of things are discussed?