Biden proposes changes to the framework of American government.
Joe Biden, in an op ed in the Washington Post (a poor way to make major proposals, in my view) proposed some major structural changes to the framework of U.S. governance today. The proposals are:
1. A Constitutional Amendment making it clear that there is no immunity for crimes a former president committed while in office.
2. Term limits for Supreme Court Justices such that a President would appoint a justice every two years for a term of 18 years on the Court.
3. A binding code of ethics for the Supreme Court.
On these, fwiw, I think a Constitutional Amendment would be justified, but I'd go further than what's stated. I don't support any kind of immunity at all.
On term limits, I don't support that either, but would support age limits. Once a Federal Judge reached age 60, or at least no older than 65, they'd be required to retire, including members of the Supreme Court.
On a code of ethics for the Supreme Court, it's a good idea, but I don't know how you impose one, given the independence of the judiciary.