The "latest evolution of warfare" noted above:

Making America's challenge still more daunting is a major shift in war-fighting technology toward cheap, unmanned aerial vehicles. The United States and its allies in the Persian Gulf have been forced to use expensive, advanced air-defense systems"such as Patriot PAC-3 missiles that each cost millions of dollars and have a long production cycle"to shoot down Iranian drones that can be swiftly assembled for about $30,000.

Unfortunately, the Trump administration has failed to learn from the war in Ukraine. Iran has learned to mass-produce cheap drones"ones that the Russians first imported and now produce themselves. In other words, their effectiveness had been tested, and their existence was widely known. But that seemed to make no difference to U.S. planners. Perhaps in the arrogant belief that a war with Iran would quickly end in a decisive victory, the Pentagon did not have cost-effective systems ready to intercept these weapons. Neither did the Gulf countries that have counted on American weaponry for their self-defense.

"If the United States appears less powerful and less reliable than it once was and is running through munitions faster than it can produce them, many more countries will follow Ukraine's example. The Pentagon is belatedly ramping up its efforts to develop less expensive self-guided weapons. But those initiatives so far seem inadequate to address the problem that the war with Iran has revealed: a gap between America's military needs and what it is capable of manufacturing quickly and cheaply."

That the blame falls on Trump's slumped shoulders seems obvious.
After all, he started it.
It's Donald Trump's Forever & Ever War of Choice.
Come on, GOPers, puff out your chests: this is what you wanted and voted for.
And inflicted on your own nation.

"This conjunction of an immense military establishment and a large arms industry is new in the American experience. . . .Yet we must not fail to comprehend its grave implications. . . . In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military-industrial complex. The potential for the disastrous rise of misplaced power exists and will persist."
Dwight D. Eisenhower
Farewell Address
1/17/1961

Ka-effin-ching!

Now that boom-boom supplies are down, down, down here comes shrieking for more, more, more at a ramped-up pace, as - coincidentally, of course - costs shoot up, up, up.