but fairly unlikely, at least not in the way you describe, with a "specific command sequence". 1) its at too low a level to be really useful as a backdoor, not without the help of backdoor software higher up, but then what's the point? there are already many "backdoor"-like ways to gain privileges as long as the software is there to support them, 2) it would have to be designed to NOT slow the CPU down or take up obvious chip real estate... the CPU biz is so competitive that any extra overhead of either type would make that chip less competitive in the market.
proper labor relations?
you mean that workers are crammed into sweat shops, making $1/hr or less, no benefits or health insurance/care, sleep on cots and don't see their families for a month at a time... Here is where the real difference is...
Anyone can make an omelet with eggs. The trick is to make one with none.