16. Wow. So of the three they do have the most power
Yes I do understand that this power is modified by the fact that they have no system of enforcement. (Presidents Jackson and Roosevelt were used as examples of POTUSes deliberately ignoring Supreme Court decisions on the Thom Hartmann show yesterday).
I am not comfortable knowing that our democracy has nine people overseeing it like this. I believe they can be used by those with designs and purposes contrary to the will of the citizenry. (I even heard a conspiracy theory that recent SCOTUS decisions are aimed to deliberately keep the electorate in deep schism.)
The fact that they can be impeached would be more comforting if I saw examples of it happening within my lifetime. Perhaps the bar for SCOTUS impeachment is higher than that for POTUS impeachment. Justice Roberts for Citizens United would be my first candidate for impeachment. Justice Scalia would be next.