That's an argument that many conservative jurists have made, such as when SCOTUS declared that due process requires that the constitutional right to counsel means the destitute get a free lawyer. (The text never meant that; it only guaranteed the right to have your own lawyer represent you, assuming you could afford one. That interpretation isn't even in dispute.) Likewise when they set lower bounds on what a speedy trial meant. I don't always agree with that perspective, but certainly the logic behind those views is sound (if incomplete), and we shouldn't be surprised that both of those changes helped to usher in the age of plea bargaining. (The real question is 1) whether we're better off and 2) whether there was a realistic alternative.)
There are always unintended consequences, and constitutional guarantees are usually too blunt of an instrument to be very useful in ending most social problems. They're too easy to get around, and courts are not institutionally capable of policing all the myriad games governments can play. Legislation is far more effective as an objective matter (and that is indeed it's function in our system), yet most people seem to prefer constitutional rules instead of legislation even while intuitively understanding that legislation is not very effective at forcing social or institutional change.