How much have our post-9/11 wars on terror cost? This year's National Defense Authorization Act ordered the government to collect and calculate that information, and the results are in. The Pentagon estimates that so far the war in Afghanistan has cost $753 billion, amounting to a cumulative cost per taxpayer of $3,785. Iraq and Syria are $770 billion, or $3,955 per taxpayer. That adds up to a grand total of more than $1.5 trillion and $7,740 per taxpayer. So far.

At Defense One, Marcus Weisberger notes: "Americans paid the most for the wars in 2010, an average of $767 apiece. The annual amount declined through 2016 to $204 per taxpayer, before growing again as the U.S. ramped up its airstrike campaign against the Islamic State in Iraq and Syria."

These figures vastly understate the ultimate monetary costs of the wars. In Reason piece last year headlined "The High Price of Security Theater," James Bovard included the costs of Homeland Security, Transportation Security Agency harassment at airports, and FBI, CIA, and NSA surveillance to come up with a total cost of $4 trillion.

The Costs of War Project at the Watson Institute of International and Public Affairs at Brown University calculates that "through 2017, the US federal government has spent or been obligated to spend $4.8 trillion on the post-9/11 wars, including medical and disability payments to veterans over the next forty years." The researchers at the Watson Institute further noted that the wars had generally been financed by borrowing. "Unless the US changes the way it manages that debt, future interest will exceed $8 trillion by the 2050s," they report.

Assuming 210 million taxpayers, the Watson Institute figures suggest that, if these trends continue, that the cost of our wars in Afghanistan, Iraq, and Syria will amount to $61,000 per individual taxpayer by 2050.

President Donald Trump wants to increase the Pentagon's budget by $54 billion. Below see Reason TV's "3 Reasons Conservatives Should Cut Defense Spending Now":