When someone died at your feet, and you raised and then demand payment, thats a no no. If you have to quit what you're doing to walk all the way across a zone to raise, then its ok. Its not a whitemage's responsibility to walk to your dead body half way across the zone to raise, that's what the fee is for, not for the raise it self, but the travel and time.
In this sense Raise is like teleport. You always have the option of not teleporting just like you have the option of releasing and walking back.
If you have ever partied up high with redmage or summoner party healer no whm. If I died in a deserted zone, I would gladly pay 10k to be raise III by a whm. It was my decision to party without the whitemage so I have to pay for his or her time to come raise me. If a whitemage was next to me and charges me though, I would be upset, but the two situations are not the same.
Its also up the individual whm and what he deemed was important. If i'm just hanging around in a zone protecting my friend and someone needed a raise, well i'm not really doing anything but watching, so I would come to raise. If I'm farming like shreg, or some other junk like mining or logging, then its different.
Like I said, the spell raise it self does not merit a reward, the effort of getting there to Raise is.