Botting and maybe solutions for it.

[Shirai]

Botting isn't a problem for just FFXI, but for every MMO and countermeasures are being made nearly every update, we just don't always see them.
But also keep in mind that bot programmers aren't sitting down on their fat arses either, every time a countermeasure is implemented they'll find another way.
It's an endless struggle.

Also, these days isn't as bad as it used to be.

Making gil in FFXI can be easy for some but if you don't have a ton of time or you hate crafting, making gil can be the bane of your existence. Players like myself would rather spend a few hours farming NPC'able items and selling them to make enough money to scrape by but others may love crafting. Each player has their own way of doing things but the point in this game that most everyone agrees on is making money is always irritating or time consuming. RMT's wouldn't have business if players didn't struggle so hard to make money themselves.

This is a matter of opinion, mine is that making gil is easier than ever.
Gil is almost thrown at you from every side of the game these days and unless you're working on a big project like a R/E/M there's hardly anything that takes truly large amounts.
This week alone I made about 1.5 mil simply by doing incursion and NPCing nearly everything that came from the boxes, and that does not include any serious gil making efforts.

That said; Making it even easier to make gil doesn't stop RMT from getting business by the way.
All that does is make sure that there's more gil in the economy, which in return makes prices go up, which also means extra business for them.