Please read Federalist No. 78, No. 79, and No. 81, available at https://www.gutenberg.org/files/1404/1404-h/1404-h.htm

& the attached chapter on "Judicial Independence" from the forthcoming Cambridge Handbook of Constitutional Theory https://www.cambridge.org/core/books/cambridge-handbook-of-constitutional-theory/DD926AE0A50620E6D798C5E678A49ED5