SE has already implemented some seriously, imho crappy, ways to significantly destroy gil.
1) if you came over form 1.0 you lost 90% of the gil stored (my tens of millions of gil went to just millions of gil)

2) selling drops from a lvl 50 mob/gathering spot will only get you 10-12 gil at the max. Same with the high end crafting gear (i have yet to see anything crafter made that sells for over 100 gil)
3) Repair costs (till they "fixed/reduced" the rates) were just a way to suck money out of the economy.
4) Teleports! good god the amount of gil it takes to go rom Uldah to Gridana or Uldah to Limsa let alone anywhere to Mor Dhona or Coerthas.
5) Foreth-coming Housing - thankfully its not a buy the house (millions of gil just for the house w/o furniture) and have to pay a monthly rent cause that would be crazy talk.
6) tax on selling 5% is fine as is. With the Market Boards, there is no money being created in game, all we have is just money changing hands, less the fees of course.
To top that off look at how you make gil:
1) side quests (which to my knowledge can only be completed once) and even then, I finished a lvl 45 side quest and walked away with less than 700 gil.
2) leve quests, (now i have only experience from a few crafting and mostly gathering) give small rewards as well (eg. lvl 35 gathering/crafting leves give from 300-600). For crafters that barely would cover the costs of the materials.
Based on this, I think they are set on destroying money quickly.