Actually... this only increases the player's wealth:
1. Smaller resale value for sales = Gather up all the cheap, 1 drake Potion ingredients and sell them until rich, as opposed to pass over them in favor of fewer, heavier, more expensive items
2. Just find wealthier merchant.
3. never buy a damn thing because it's easier just to find or make it yourself... There's a reason why, when a store (that isn't owned by Activision) needs to drain it's customer's pocket's quickly, it lowers, not raises, its prices.
These solutions worked perfectly IMO as implemented by mods for Oblivion, FO3 and FNV, such as Expensive Wasteland and Enhanced Economy. And they absolutely did not
increase the PC's relative wealth. On the contrary, they made the PC feel much more impoverished and it was a struggle to survive.
Of course, the objective is not to make things so expensive that you want to give up playing the game, or just never buy anything. If increasing all merchant prices by 5x is too much for you, I'm sure there will be a different mod that increases merchant prices by 2x, or you can tailor whatever economy solution works best for you. Perhaps you would prefer the vanilla version of the game? Or maybe you prefer increasing merchant prices by 10x.
In my case, if I ever reach a point where I become so filthy rich that there is no more point in accumulating wealth then the game instantly becomes boring for me and I must retire that character.
If there is no more progression, no more saving and scrounging to try to buy something I really want, nothing to look forward to, then the game is over for me.
In order to prolong that feeling of poverty, I've gotten a great deal of mileage out of installing mods that make all merchant prices about 5x more expensive, and make it harder to get rich by selling loot (resale prices much lower than vanilla game).
I have never played a version of Oblivion or FNV where I didn't need to buy anything at all:
- spells will need to be purchased in Skyrim as they were in Oblivion, in which case, after my mods they will be tremendously expensive, both lower level as well as high level spells.
- I will most likely buy a lot of expensive arrows during my Skyrim playthrough
- hopefully there will be some really cool, powerful and expensive magic items in Skyrim (if not, then I will use mods to add some)
- I will need to buy lots of crafting materials and alchemical ingredients
- I will use survival mods to incorporate hunger, thirst, hypothermia and sleep deprivation features, so that I will need to buy food, drinks, and rent rooms for the night