Do it

Sen. Chris Van Hollen (D-Md.) is expected to bring up a proposal today at a Senate Appropriations Committee meeting that would use Congress’s power of the purse to pressure the Supreme Court to adopt a “code of ethics.”

The committee will mark up three spending bills today, including the one that funds the Supreme Court.

[...]

The Early obtained an amendment he is expected to at least bring up for discussion, if not formally offer, that would withhold $10 million in funding from the court’s $110 million salaries-and-expenses account until Chief Justice John G. Roberts Jr. informs Congress “that the Supreme Court has put into effect a code of ethics for the Chief Justice and the associate justices of the Supreme Court of the United States.”

  WaPo

And would the Supreme Court have to rule on that?

While Democrats back Van Hollen in principle, his effort is unlikely to advance because of concerns it could make an already fraught debate over the annual spending bills more complicated. And no Republicans are expected to back it.

Unsurprising that Republicans care nothing for ethics.  So...forget about it.

...but hey, do what you want...you will anyway.