Earlier quoted context omitted.
> The Congressional Budget and Impoundment Act of 1974 is explicitly clear about this, there is absolutely no room for debate. Yes, but is that Act constitutional? Has SCOTUS upheld its constitutionality? That’s where there absolutely is room for debate.
Has the government's right to mow down civilians with helicopter-mounted machine guns been tested in the Supreme Court lately? That's where there absolutely is room for debate. This argument can apply to literally anything.
There are law journal articles debating whether the Impoundment Control Act is constitutional. And that isn’t a new thing, here’s one from 1990: https://heinonline.org/HOL/LandingPage?handle=hein.journals/...
There’s a big difference between a law for which there have been longstanding serious scholarly objections to its constitutionality, and a law whose constitutionality has never been questioned in any serious forum