That system explicitly encourages mucking with it. We have elections every 2/4/6 years. It has an amendment process. Parts of it, like judicial review and qualified immunity, were just plain invented.

Per Jefferson:

“On similar ground it may be proved that no society can make a perpetual constitution, or even a perpetual law. The earth belongs always to the living generation. They may manage it then, & what proceeds from it, as they please, during their usufruct. They are masters too of their own persons, & consequently may govern them as they please. But persons & property make the sum of the objects of government. The constitution and the laws of their predecessors extinguished then in their natural course, with those who gave them being. This could preserve that being till it ceased to be itself, & no longer. Every constitution then, & every law, naturally expires at the end of 19 years.”