slavery was work that the colonies forced upon kidnapped people that we bought; indentured labor had to do with forcing those who owed you a debt to work for you until they paid it off. the similarity is that people were forced to work in often harsh condition, and harsh rules, without paying them.
Generally speaking, the chief executive is a member of the legislative branch in a "unitary form of government", since in this government there is only a single governing body.
