Note that it is not only for supreme court judges, but for inferior courts (i.e. all other federal judges) as well. The appoint is for life only if they behave themselves. What happens if they don’t behave themselves?
As for why the rule is written into the constition, it is presumably there so that judges can make difficult, unpopular, but judicially sound decisions without fear of losing their jobs.
And as to why it’s in the Constitution, the founders wanted federal judges to be impartial. With a lifetime appointment, the judges wouldn’t have to worry about acting according to popular opinion in order to get reelected.
I always considered the re-election issue to be somewhat specious. Maybe not in the 1700s but certainly today.
By saying justices need to be able to make unpopular decisions without fear of not being elected again is saying these justices are of such low moral character that they would rather DO what is wrong than lose their job.
If I had to be elected every 4 years I would still do what was RIGHT regardless. Because I have morals and scrupels(Sp?) and if I wasn’t re-elected so be it.
Especially now that justices would make far more money in a non governemental position than they make sitting on a court.
So, at least today, it isn’t about holding a job. Frankly I’ll end this mini-rant by saying I don’t want anyone on the Supream Court or any other court that can’t stick by his convictions even if it means losing their jobs. I have quit jobs rather than do things I knew were wrong. We wouldn’t have the Enron (and others) mess if people did what was right instead of fearing for their jobs.
I think the real reason is that the justices can, in effect, write law and by sitting for what may be a generation, the law can’t be changed back within say 4 years. That time people will get used to it. And the laws will then stick.