The US already benefits hugely from its military power, and US intervention in the world is rarely—if ever—a purely altruistic endeavor. Leaving aside whatever deterrent effects having the world’s most powerful military might create, the US also benefits in terms of the influence it gains or maintains over other countries, their governments, and oftentimes their industries. That’s why the price of gasoline in the US is so much lower than almost everywhere else in the world: placing soldiers on every major oil field gets us the employee discount.
That said, we probably shouldn’t look at money as the only cost the US incurs for sustaining such a large military. Yes, it has by far the world’s largest military budget. And given how many military resources never get used, it would be pretty easy to save a lot of money without decreasing overall effectiveness. But intervention and military posturing also has a cost in terms of reputation and respect. Many people view the US with antipathy or aggression, and they’re not always wrong to do so. That’s not something that other countries can really compensate the US for.
Regarding that last point, the only way for other countries to take some of the heat off of the US is to do some of the intervening and posturing themselves. But of course, most of them don’t have the political willpower to do so regardless of whether or not they want to.