The other guys being killed will just make things worse.
Hank knows Mike is involved already. If every other guy on that list suddenly turns up dead except Mike who do you think they're going to investigate first?
Mike is stuck in a situation where he has to pay, but he wrong for making Jesse and Walt give up part of their shares.
For next week promo, Mike is ready to walk away and Walt says "nothing stops this train."
So, Mike has options and is not worrying about a thing. That's why he didn't worry when the police had Gus lap top.
Vince Gilligan is the only reason Mike is around.