Also, it's important to realize that our founders completely understood that time is not static, but rather constantly changing and dynamic. For this reason, they put in place a mechanism that would make it impossible for our Constitution to EVER become outdated or obsolete. This mechanism, of course, is the amendment process outlined in Article 5 of our Constitution.
Remember that whenever you hear somebody say that the Constitution is outdated or antiquated. Congress routinely usurps the Constitution, even though a process exists by which they could amend the Constitution if it was indeed necessary. The reasons Congress rarely uses the amendment process are many, the least of which is not the fact that it takes a pretty dang big consensus to actually make amendments (and rightfully so). We The People are also directly responsible for allowing, and even advocating, usurpation's of our Constitution to take place as a matter of "convenience" and apathy. In fact, it is We The People who shoulder the vast majority of the blame when you get right down to it.
So while it's easy to place the blame on crooked, self-serving, no-good, low-down and dirty politicians, they are really only a part of the problem. The other, larger part of the problem is We The People as a collective. We've been far too willing to give up essential freedoms and liberties over the past 100+ years, in exchange for perceived security in the form of government provided "goodies". We are now entering the period in which we will pay the price.