See this from wikipedia, for example: The JSF program was expected to cost about $200 billion for acquisition in base-year 2002 dollars when SDD was awarded in 2001.[56][57] As early as 2005, the Government Accountability Office (GAO) had identified major program risks in cost and schedule.[58] The costly delays strained the relationship between the Pentagon and contractors.[59] By 2017, delays and cost overruns had pushed the F-35 program's expected acquisition costs to $406.5 billion, with total lifetime cost (i.e., to 2070) to $1.5 trillion in then-year dollars which also includes operations and maintenance.[60][61][62] The F-35A's unit cost for LRIP Lot 13 was $79.2 million.[63] Delays in development and operational test and evaluation, including integration into the Joint Simulation Environment, pushed full-rate production decision to March 2024, although actual production rate had already approached the full rate by 2020; full rate at the Fort Worth plan is 156 aircraft annually.[64][65]
The entire Middle East begs to differ.
On a more statistically relevant note, just note that US / Nato allies feature on like 1/3 of armed conflicts in the 21st century.
https://en.wikipedia.org/wiki/List_of_wars:_2003%E2%80%93pre...
Edit: Just in case it wasn’t obvious, this evolving situation is counter to the hypothesis that improving military capability means ‘world peace’, particularly when there is always asymmetry and misalignment between geopolitical forces
Sorry, you said won, not pay for. But the point stands. If we were to get into a conflict with China, not sure how the military industrial complex would get funded.
And they always cause misery and suffering, even if they are just.