Should the government increase or decrease military spending?

Canada’s defense budget is currently $20 billion a year which is less than 1% of its GDP. This is much less than the $600 billion a year the U.S. spends and the $6.5 billion a year the UK spends. Only 5 other countries of the 28 in NATO spend less. To join NATO each member country pledged to spend at least 2% of their GDP on military spending and defense and defend each other against threats from any non-member country. In a July 2016 U.S. Presidential nominee Donald Trump suggested that the United States would not defend NATO member countries who had failed to increase their military budgets to above 2% of Gross Domestic Product. France, Turkey, Germany, Canada, and Italy are countries that are currently spending less than 2% of their GDP on military defense.