US defense expenditures as of 2021 were at @3.5% of GDP, which is low, not quite a post-WW2 low, of of 3.1% as of 1999-2000, but not far from it.
Only a European would say that so glibly. Do you have any idea how huge the US economy is? 3.5% of GDP is far from chump change... especially when you are allowing your infrastructure to crumble.