The Court is the only essentially unchecked branch of the federal government. I think its well past time that that fault is remedied (too bad I can't say how..I'm not a lawyer)
It is far from unchecked. Of course, the President has the power to appoint judges. Another check is held by Congress, which may, under the Constitution, define the appellate jurisdiction of the court. ("The supreme Court shall have appellate Jurisdiction, both as to Law and Fact, with such Exceptions, and under such Regulations as the Congress shall make.")