"Wallace started by saying: “It is obvious that Britain is not a superpower,” before appearing to switch focus to the US." ... "a superpower that is also not prepared to stick at something isn’t probably a superpower either. It is certainly not a global force, it’s just a big power”.
This creates a particular problem for the UK's nuclear deterrent - which is based in Scotland.
[1]: https://en.wikipedia.org/wiki/List_of_countries_by_military_...
[2]: https://web.stanford.edu/class/e297a/U.S.%20Defense%20Indust...
> Those close to the defence secretary acknowledged that his remarks could be read as being aimed at the US. An insider argued that the British minister was emphasising the importance of political will as well as sheer military power.
It now doesn't matter as much how much of GDP you spend on military but also political power as well.