Okay, you've got a point on the resources thing, but nowadays we can at least come up with a bullshit reason for invading, like going to war against terrorism.
And I actually did enlist. I had a contract with a $40,000 bonus in the Infantry, and I had Airborne School and Ranger Indoctrination Program guaranteed. As in, I would've walked out of Infantry OSUT and stepped into Airborne School next door, no questions asked, and then gone straight into the Rangers right after. But, I didn't like the level of obedience required, so I got out before I finished OSUT. It's hard, but not impossible.
Soldiers in Iraq and Afghanistan are hunting terrorists, not people who just want to be left alone. They're killing people who are actively trying to kill them and anyone else who doesn't believe what they do; quite different than a war for profit. Yeah, there's most likely some profit involved for the higher-ups, but at least the grunts have a legit reason to be there.
Ever heard of Blackwater? Yeah, government contracted, but not government controlled. Even today, there are private corporations that might as well be infantry units, but they're not under government control except for having to obey the law, like everyone else. If you get the right licenses, it's absolutely possible to have people that well-armed under private control.
No hard feelings, man, just debating our opinions.