The Supreme Court

I was reading today that President Obama is likely to have a shot at appointing two new Supreme Court Justices during his presidency.

But my question is why this job is a job for life. Surely there should be an age limit of say 70?

John Paul Stevens is 88 years old!

While I am sure that some of these old guys have a great deal of legal experience, it's just too old to be doing a job as important as that.

I say there should be a 10 year term limit on the job, and they should be retired no later than their 70th birthday.