1) inviolate property rights,
2) recognition that coercion is not a proper means to order society, and
3) no one, regardless of employer, is subject to laws different than the rest (setting aside who makes and enforces the laws),
the Constitution is of little comfort as a document, although certainly better than others of which I am aware (especially when taken with The Declaration of Independence).
That these were not clearly delineated is a flaw. There may be hints of this in the document, but like any written document, subject to interpretation. Even the Fifth Amendment makes clear that private property can be taken.
Of course, there is that little problem of being party to an agreement that one was never party to....