Dernier*Cri exists to remove that inflation you're referring to. Once there's less gold in the system, it's easier to reach items because they'll be cheaper. As more people are able to afford them, they'll get more expensive, again, however.
Dernier*Cri is a shop for just the rich. It's something Gaia members have requested for a long time. If it was CHEAP, then it wouldn't be what we asked for, would it?
How is BootyGrab not worth it, however? I know people who make 50k a day. With that, you'd only need to play it for 10 days to afford something really expensive.
There's also PLENTY of beautiful items in the shops, and items that are still cheap. My avatar right now isn't worth very much compared to the items at Dernier*Cri. Even being able to afford some of the bigger items, I still appreciate the look of commons, with a few accessories from EIs.