One thing I’m starting to dislike running OSR adventures is the insane amount of treasure and magical items that you find. In addition, the more I read the DMG, the more I feel they were just too generous with treasure and had to come up of endless ways of spending it (training, upkeep, research, rust monsters, disenchanters, etc.).
When gold = xp this can be a problem, otherwise just giving less gold is the easy solution.
If this is a problem you even want to solve this is what I would do: