U.S. defense spending of $800B+ per year exceeds the next ten countries combined. Spending grew substantially through the post-9/11 era; subsequent debates have centered on right-sizing for great-power competition with China and Russia.
Key debates:
- Top-line: Increase, hold, or cut?
- Force structure: Two-war capability vs. focused on China; ground-force size; carrier numbers; air-superiority modernization.
- Procurement reform: F-35, Sentinel ICBM cost overruns; commercial-tech access (SpaceX, Anduril, Palantir).
- Personnel: Recruitment shortfalls, pay, benefits.
- Strategic competition: Indo-Pacific posture; deterrence of China.