The money spent on UN Peacekeeping is less than 0.5% of money spent every year on weapons and the military. 

The global budget for UN Peacekeeping is relatively small, typically amounting to less than 7 billion dollars annually. In comparison, global military expenditures and weapons spending exceed 2 trillion dollars each year. This means peacekeeping costs represent a tiny fraction, well under 0.5 percent, of what is spent on global militaries.