To try and reduce some of the problems with federal Judges, I would suggest a constitutional amendment to prescribe a minimum age of 50 and a mandatory retirement age of 70.
No, that's two very arbitrary rules that would potentially deprive us of some great legal minds.
Back in the early 19th Century, two men were appointed to the Supreme Court at the age of only 32 years old. One of the two was
Joseph Story, who was pretty easily the greatest Supreme Court Justice of the entire 19th Century. His influence on American law was and still is very widespread.
In the 20th Century, William O. Douglas was appointed when he was 40, Potter Stewart was appointed when he was 43, Byron White was appointed when he was 44, and Clarence Thomas was appointed when he was 43. Do you think these men were too young to be appointed?
Another one of the Court's greatest legal minds ever was Oliver Wendell Holmes, and he stayed on the Court until he was 90 years, 10 months old, the oldest Justice to ever serve. Much more recently, John Paul Stevens retired when he was 90 years, 2 months old. There was nothing wrong with either of them staying on the Court until that age.
Your choices for minimum and maximum ages for membership on the Court, if they had been implemented from the beginning, would have deprived us of a little more than half of Story's magnificent career and more than two-third of Holmes's career. What if we have, right now, in this country, an outstandingly objective interpreter of law who is only 40 years old -- you would make him wait for 10 whole years before he can be appointed? Why? What if there's another outstandingly objective interpreter of law who is 65 years old and who gets appointed at that age, and is so healthy he or she could easily live another 25 years; you would force them to retire after only 5 years? Why?
Your choices are arbitrary and based on a dismal assessment of human nature.