FDR's "court-packing" relied on mandatory retirement for all justices at age 70.
Sound like a good idea?
FDR announces “court-packing” plan | February 5, 1937 | HISTORY
"During the previous two years, the high court had struck down several key pieces of New Deal legislation on the grounds that the laws delegated an unconstitutional amount of authority to the executive branch and the federal government.
"Flushed with his landslide reelection in 1936, President Roosevelt issued a proposal in February 1937
to provide retirement at full pay for all members of the court over 70.
"If a justice refused to retire, an 'assistant' with full voting rights was to be appointed, thus ensuring Roosevelt a liberal majority.
"Most Republicans and many Democrats in Congress opposed the so-called 'court-packing' plan."