Trouble is who decides whatthose interests are and how are they going to be met......
If we spent 20% of GDP on defence we'd still have fights over what we buy and use with each Service and Defence Industry company fighting to maximise their share and do the rest down.
What is clear is that we can't do meet anything like the current roles required at 2% - I suspect even 3% wouldn't be enough
So which politician is willing to go and slaughter a few sacred cows elsewhere - say bus passes, Doctors salaries, the tax break on pension contributions, higher petrol prices, a tax on builders land banks, civl service pensions etc etc.......................
I'm not holding my breath...................