Such empty promises are just silly. The most traitorous and treacherous have no problem in lying on their oaths. Most likely, it just catches well-intentioned fools.
I remember one cagey individual whose employer not only gave him endless and underhanded “employment agreements”, of the lowest order, designed to cheat their employees, but foolishly countersigned them after demanding his signature.
Invariably, when presented with such forms, he claimed to have forgotten his reading glasses, and requested to take the form home and later return it.
He would then return a modified duplicate of the form with his signature on it, which they would countersign and then file, providing him with a copy which he very carefully preserved.
When they finally attempted to fire him, a few years before retirement, in hopes of cheating him out of it, they were truly shocked to discover the lavish early retirement and/or discharge benefits that they had years before promised to provide him, repeatedly.
His lawyer was prepared. The company first pretended to have lost all his paperwork, before being shown all copies with their signatures on it. Then they gave him everything his phony forms had promised, on condition he drop the lawsuit.
Great story!