It's the way it's been for a LONG time, JSO. Since 1803. Blame this guy:
I do blame John Marshall and have since I first read about
Marubury vs. Madison and its impact something like 25 years ago. I think that Thomas Jefferson was being prohphetic when he wrote, in referring to that decision, ""The opinion which gives to the judges the right to decide what laws are constitutional and what not, not only for themselves in their own sphere of action but for the Legislature and Executive also in their spheres, would make the Judiciary a despotic branch," and "The Constitution on this hypothesis is a mere thing of wax in the hands of the judiciary, which they may twist and shape into any form they please."
I also blame the Congress of the time and even Jefferson for failing to nip the concept in the bud, assert their authority, and slap the Judiciary down right then. The Federalist Papers clearly indicate that the intent was for it to be the weakest of the three branches and that decision laid the foundation for making it arguably the strongest in that it may act unilaterally in total absence of accountability and/or public support to declare the "final word" on a given issue.
But I don't think it's been "that way" since 1803. I think that at first the Judiciary stuck reasonably close to the Constitution and gradually evolved away from that. I think things really got bad in the early part of the 20th Century.
In any case, it's not a good idea. We are supposed to have government by the People and we are allowing an oligarchy of nine totally unaccountable officials say that the Constitution says whatever they want it to say. It really is a situation in which we are not governed by the Constitution. We do not, at this point, have a "Constitutional" government.
If the Constitution is to rule, its interpretation must consist of an honest effort to divine the original understanding of each bit of language and to apply the best assessement of that original understanding to the situation at hand. If we don't like the result, we can propose Amending it. Then if we develop enough support to do that it can be Amended. And if we can't develop enough support the effect shouldn't change. And that's the way it SHOULD be. The effect should be stable and difficult to change. Otherwise there is no point in having a Constitution and "Constitution" is just a word judges use to add some kind of aura to what's really just their personal opinions about what's best.
It just amazes me that ANYBODY who believes in government by the People supports this current circumstance because it is totally contrary to the government by the People concept. The Constitution belongs...or should belong...to the People; not the Court. And, again, it should control what Judges to rather than Judges controlling what IT does. And it's insane to vest such power in an institution that has zero accountability. I don't see how anybody can think tremendous power with no accoutability is a good thing.