I've seen a Marine Corp General fly coach in uniform. Nobodys telling Pelosi that she can't fly on military aircraft, she's just peeved that she can't take her entourage with her.
You obviously know little about executive transport in when it comes to General and Flag Officers in the US military. Three stars and above almost always rate a military executive transport. VR-1 exists almost solely to transport the SECNAV, CNO, CMC and other very high ranking Navy types around and the USAF has dozens of C-21's stationed around the world to transport guys with stars on their shoulders around, and that is just to name a few. Catch a clue.......