A couple ideas to deal with inflation:
-Honestly just bring back the lottery (God knows if it is still there and I'm just too lazy to check). Have the prize set to essentially be 1/10 of the total pool of money, the rest being essentially burned.
-Put yang-burning mechanics not behind necessary improvements , as there is plenty yang-burning through upgrades (as
@Toxic confirmed), but behind "luxury" game mechanics. Want to maintain a big costume collection? Pay "rent" to Hong-Hae per extra costume inventory spot after an arbitrary number, say 3. Add a pet that allows you to sell from anywhere that you pay a wage to (we hate uncompensated animal labour). What happened to the tax for the...LUXURY...of selling from a shop that stays open 24/7.
-Increase alchemy upgrade and fusing costs. They're already in the gambling scene, might as well tax them for it.
Do treat this with a grain of salt as these are just semi-rushed ideas on what combating inflation would look in a somewhat seamless, low-friction scenario. Overall I believe luxuries should be taxed and the current costs of necessary/key improvements is already at a good level. This would obviously be easier to discern with actual market and yang information as back-up.