"Constitutional Law is the foundation upon which our society is built... And iits imperfections are actually a source of strength .... as they provide the flexiblity necessary to consistently support the society as it evolves over time."
Here's where I think you've got Jefferson wrong... he seems to believe we can work around minor imperfections... presumably for some social stability BUT... even if those institutions are imperfect they MUST... (Jefferson uses this term TWICE) keep pace with the times. He never seems to say we must endure the imperfect for all time for the sake of social stability. And in this sense he's seems to hold the same opinion he did in 36 years before in the Declaration of Independence.
"I am certainly not an advocate for frequent and untried changes in laws and constitutions. I think moderate imperfections had better be borne with; because, when once known, we accommodate ourselves to them, and find practical means of correcting their ill effects. But I know also, that laws and institutions must go hand in hand with the progress of the human mind. As that becomes more developed, more enlightened, as new discoveries are made, new truths disclosed, and manners and opinions change with the change of circumstances, institutions must advance also, and keep pace with the times. We might as well require a man to wear still the coat which fitted him when a boy, as civilized society to remain ever under the regimen of their barbarous ancestors."
From the DoI:
Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn that mankind are more disposed to suffer, while evils are sufferable than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.
The question is whether we've all become more disposed to suffer under a system that seems incapable of producing morally legitimate government based on democratic principles.