If I have 2 save games. In one I have a level 40 warrior, in the other a level 2 theif. Let's say I go to the same rogue camp with 5 bandits in both games. Why should there any difference between the games just because my level is higher in the one?
On kind of the same note, If I'm level 50, and play to the end of the game and find a powerful unique sword in one save. Then I start a new game and the first thing I do it go retrieve that sword, I'm level 5 when I receive it. Hmm this is odd why is it not the godly weapon it was in my other game?
Loot Scaling:
To make the game not as predictable, so it's not as simple as just figuring out where the devs placed the items. You don't need a scaled system. It just needs a randomization factor. For example, in one game the Blade of Woe will be carried by Skorvaar the Horrendous, in the next it might be carried by Gerald Meade-Drinker. The idea of course needs refinement but it gives a basic idea to think about. Also perhaps some games the player will get lucky and find a glass armor set early on, but in three different save files, he hasn't even found one piece