It's an unworkable idea put in to give the appearance of offering options.
What workable option(s) would you suggest, and did you put them to your industry association rep when the navaid rationalisation project was announced some 5 years ago?
Some of this is just a belt & braces approach that is gold plating the system
Periodic flight testing is mandatory, along with other requirements per CASR.
modern NDB's require a building about the size of a phonebox
Difficult to fit a large wire antenna in a phone box.
There are 130-odd NDBs remaining, including most of the capital city GA ADs.
Too late to complain now - should have been more vocal years ago, although the RAPACs weren't.