Second Pilot in a single-pilot jet?  

Anyone who suggests that just because "a person who can afford to own and operate a business jet should be able to afford a second pilot" really knows very little...so very little...about rich people. They are the cheapest a-holes on the planet. They not only want to keep ALL the money they already have, *and* use OPM (other peoples' money) for the "deals" on which they're always working. Second pilot? Rich people can't stand the fact that they have to hire the first pilot, who they feel just sits around and does nothing in between flights. I worked for one very unpleasant rich guy who twice told me, "You know, if you quit, I could find another pilot tomorrow." The first time, I was insulted. The second time, I took him up on it. He went through a string of replacements until he finally got fed up and sold the aircraft. And he was not the worst rich guy I've worked for.

In this particular Citation jet crash, a second pilot may not have helped. If neither of them realized that the cabin wasn't pressurizing, they both might've simply become incapacitated and gone to sleep as the jet climbed. What is needed is a big ol' bright red light on the dash that comes on and a *loud* alarm that sounds when the cabin altitude goes above 10,000 feet.  The Citation 560 has neither.