News flash, I'm furloughed and don't fly wealthy people around. The people I do fly though, are quite happy and appreciative for what I'm doing.
But let's look at why flying wealthy/famous people around (again, something I no longer do) requires a higher degree of professionalism and safety than flying car parts. If one of the fracs dorks a plane with a celebrity onboard, the entire country will find out. The backlash against the company could be big enough to cripple it permanently. What happens when a cargo plane goes down? Maybe some coverage at the location of the crash, and maybe some coverage at the hometown of the company. The rest of the world never finds out and doesn't care, and the cargo company will continue to get business as long as they are the lowest bidder. It may be a cold way to look at things, but that's how they are.