Why the fear of using the amendment? Let's hope it doesn't come to this, because it will tax more resources - but if it does - there is a process and I have faith in it.
There's an Amendment that is JUST as unrelated, the FIRST Amendment. It guarantees freedom of speech, freedom of assembly, freedom of religion.
Why not "use" that Amendment?
It has no more applicability to the President's desire to spend without authority than the 14th Amendment does.