The very rich benefit most from national security, government-funded research, infrastructure, and property laws. Defending the country benefits the rich more, because they have more to defend.
Why the Rich Should Pay More
Anybody who thinks we are in Afghanistan and Iraq because poor people and the middle class needed us to "Fight 'em over there, so we won't have to fight 'em over here" is delusional. It's about oil and the rich people who own oil companies. Let the rich pay for the Defense Department budget and things would be a little more just.