After years of central banks propping up the financial system and easing the borrowing conditions of national governments, one analyst has predicted that the next big wave of cash flooding an economy could come from increased military spending.

"Simple idea, what if (the next round of quantitative easing) shows up in the form of defense spending? And, I think we are seeing that," Pippa Malmgren, the founder of consultancy DRPM, told CNBC Wednesday.