What right do you have to dictate what terms free people should agree to?
Your question is ambiguous.
Are you asking "what right do you have to dictate what free people should do" BEFORE they give consent or "what right do you have to dictate to people AFTER they agreed to certain terms"? Should state to be able to tax people? Should state to be able to draft men to the army? Should state be able to pass laws prohibiting or ordering people to do something? Can majority be able to impose its will om minority and if so in what areas?