Why does the OP sound like the kind of person that would get up in arms to defend scalpers and trust funds while bragging about their degree in Economics? So far, everything they've proposed only benefits a very minor part of the population and in a very abstract way while hindering the rest with no visible payoff.

Not to mention most earnings nowadays are passive, coming from subaquatic voyages. If SE wanted gil to have more impact, they would be shifting the bulk of the gil earning back to gatherers and crafters.

The low value of gil would only be a trouble if it actually caused a meaningful inflation in the MB, which it really doesn't since, like gil, most products are virtually unlimited too.