There can be subjective values that are objective. The problem is when objectivity is brought into the realm of politics, then the truth component of objectivity turns into social truth, and extending from there turns into a supposed social objectivity.

The problem with government systems is they depend on social objectivity to be universally agreed upon by those within the system. There to my knowledge, has never been social objectivity that was agreed upon by everyone all the time. So the idea of governmental systems may have a significant flaw, and to even construct one may be the first fundamental flaw.