Had a similar experience, head of state didn't turn up on time and we were prevented from departing without him. Had we got away the consequences of leaving him behind would have been considerable for our traffic rights in one of our more important markets.
Standard protocol was a red carpet arrival at the aircraft with good bye handshakes. As we are a low cost carrier (yes seriously), he should have been in line with his boarding pass ready. We operate on 30min turn arounds.
If you want special treatment there are plenty of executive jets available for charter which will run to your schedule. If travelling on airlines be on time or get left behind. If you can't afford a private aircraft you aren't important enough to delay for.