Can a sitting POTUS have her/his wages garnished by court order?

Right. I read the case now. Very short. I agree that it speaks of sovereign immunity, but also of property law. Under the principle announced in the case, why can’t Acme Inc. say that it has none of UltraVires’ money because it has not been disbursed yet?

Presumably Acme has some independent obligation to pay you. The garnishment order interposes itself into that relationship.