That's almost like an exercise in economics. There's a middle ground of what the buyer (i.e. the employer) wants and what the seller (i.e. the applicant) wants. Buyer wants all sorts of qualities + a low salary + an NDA and non-compete, seller wants a high salary + a good work place + no NDA or non-compete contracts. Somewhere in the middle both buyer and seller should be satisfied, if one can live without the NDA contract then its not needed in the negotiation. If its a non-starter then the applicant can look elsewhere.