Is this a problem, though? There’s currencies like the Yen which have high numbers, the users just adjust their mindset of how much is “a lot”. Reducing the numbers wouldn’t change the problems of things getting more expensive. This feels like treating a very cosmetic symptom of a much larger problem.
The wealthy would still possess an obscene and unfathomable amount of wealth and the impoverished would still be struggling to get by, just the numbers would be smaller. Does that help anything?