Fundamental Physical Constants and the Principle of Parametric Incompleteness

The principle which allows to construct new physical theories on the basis of classical mechanics by reduction of the number of its axiom without engaging new postulates is formulated. The arising incompleteness of theory manifests itself in terms of theoretically undefinable fundamental physical constants $\hbar$ and c. As an example we built up a parametric generalization of relativistic theory, where the Hubble Law and the dependence of light velocity on time are obtained.