Because you're being so ridiculously vague, I'm going to go with "no."
Limited government shouldn't make any edicts regarding vague academic BS. 
With properly limited government, social norms are none of the government's business, and free markets handle unequal power relations just fine.
By your vague wording here, it sounds like you'd describe any/all employers as coercing their employees because of their "unequal power relations." Insofar as you've described all of capitalism and free markets as inherently coercive, because some have more/less than others, "no" to all of your inquiries. Freedom does not require government to save us from it. It serves us quite well. If productivity being rewarded is "coercion" by those who earn buying power, bring on the coercion. It benefits us all.
Regarding your response to Mr. Yell, the free market protects employees better than any government ever has/could/will. I'm sure you could think up some examples where reasonable laws wouldn't be a bad idea, but most of the time competing employers are forced to treat their employees well or lose them (along with productivity and training investment, and even brand equity in extreme cases involving publicity).
Freer markets inherently involve more opportunity than massive government debt, called "investment" by communists who don't understand that government consumes; it does not produce. Nothing is perfect, but freer markets provide for everyone better than a government with tens of trillions in debt (not officially acknowledged for propaganda purposes, but nonetheless owed) which will eventually crush our nation and its social services. We literally cannot afford all of this big government nonsense, and this fact will become undeniable in time.
[I wish I could obey forum rules]