Most countries have, at most, one or two aircraft carriers, maybe four little ones if they're really ambitious like France or Japan. These are the pinnacle of power projection and are extraordinarily expensive to build, own and operate.

The United States has eleven of the largest carriers in the world and a bunch more that are smaller that are still bigger than what other countries consider a carrier.

That's an example of how disproportionate it is in terms of overall size. Not manpower, not GDP percentage, just size.

Where other countries have one or two of something the United States has at least ten. This goes for planes, tanks, cruisers, helicopters, missiles, pretty much whatever, they've got more.