I will note again, that the congress has the power to
abolish the Supreme Court or even the executive branch or both
through constitutional ammendment.
No such power is vested in the Supreme court to abolish
the congress or executive branch, they can neuter them however.
Therefore they are not really co-equal [:«)
This is to say that the congress, with the assistance of the state legislatures or state ratifying conventions, has the power to change everything in the Constitution, except eliminate the equal representation in the US Senate. They could eliminate Congress (but not the Senate, I guess), make the US a hereditary monarchy, establish Islam as the state religion, make one race the lifetime slaves of another race, etc.
I do not think that any of those proposals, or yours, would get very far in the process though, do you?