Simple question then.

If a crafter (assuming they did not buy gil) had 10 million gil it seems the amount taken was 10mil divided by 100. So they were left with 100k gil.

But they made at least 300k of that from questing/leves/fates/etc.

So where did the other 200k go? These people didn't knowingly do anything wrong - why take their quest/leve gil too?