To be fair, most inside threats come from people with high-level access to systems already. Specifically, contractors and consultants with administrative access to systems can plant all manner of rootkits and trojans, and with American companies still Hell bent on outsourcing IT to India, Russia, and Mexico, it should be no surprise to most of us that our data is about as safe as a dollar bill stuffed in a mattress.
Actually, a dollar bill stuffed in your matress is about as safe as it gets these days.
I have never thought the executive lure to source code overseas or hire a bunch of H1s was smart.
They do it to increase their bonuses, but the compromise their systems.