The Injustice of the Justices

Suppose a justice, appointed for life, is found to be certifiably insane, and is removed from the bench and hospitalized for observation and treatment. How can this seat be vacated so this person can be replaced without going through a long and drawn out impeachment process ? Now mulitply this problem by five and you realize the situation facing the nation. These people are literally involved in making life and death decisions, they are the death squad Palin has warned us about. They have put all of us at risk, the whole country, our democracy. How now can we get rid of them ?