As a generality, the smarter folks are in the private sector. In government, your mid-level bureaucrats are those who can't "make it" in the private sector. That doesn't mean there are no drones in the pivate sector or no sharp folks in government, but the percentages favor the private sector.
The larger motivation, of course is the notion of profit. Since governments don't sweat profit, there's little incentive toward efficiency.
Art