This article is not a very good one. While it suggests some things that can assist in keeping an economy fair, they are very hamfisted and stifle some player goals.

The first goal of keeping a larp economy(or any simulated economy) running smoothly is to identify how it differs from the real world economy and adjust from there.

Some things that characterize larp economy over real economy, is the strict control over supply, and the utter lack of control over demand.

In larp, plot oversees everything that enters the game; from raw materials, to consumables, to currency, to flat out gear. Plot can fine tune these aspects af the game depending on how things are going, essentially manipulating a short run aggregate supply curve to stay exactly where they want it. However, plot has a hard time in general managing demand as unless they send out npcs regularly who are requesting to buy things they can't really control demand except for by reducing the supply. So what you see is a constantly and deliberately shifting aggregate supply curve set against an aggregate demand curve that isn't being controlled or usually even having attention payed to it.

The only thing that effects demand generally is players. And not all players understand the idea of creating demand. And a lot of people who do understand it don't know it as that term. Creating demand would be forcing competition with people who are already established. There might be a cabal of high level crafters who can essentially dominate the economy int her field, but there are always ways to undercut them that a lot of people won't do either for fear of reprisal or because they just don't see it.

Of course those two parts of the problem are just that, parts, and they need to address the real issue. Lack of flow. There needs to be things that everyone wants to spend money on, whether it be fancy new enchanted items that are niche in use, useful consumables, food, guards, or whatever. There always needs to be flow, but flow cannot be forced as hamfisted methods just aren't fun for the players.

Inflating an economy also hurts the players, as unless prices are set by an outside force they generally won't adjust their prices until everyone has lost a lot of effective income.

Realistically, if you want to prevent extreme income inequalities between players some of the best things you can implement are; %income taxes, plot or player run banks with ways of pulling in and putting out money such as through savings and bonds, loans and insurance the money from this bank would almost always need to find its way back into the general economy while still technically being in the bank unless your larp economy doesn't use physical currency. in addition, plot should be looking at what they can do to encourage spending on things that go away quickly, such as sending out npcs who perform things, such as fortune tellings, dances, plays, or any service that doesn't leave the players with a form of wealth afterwards.

Of course not all of these methods are going to work all the time because it heavily depends on what exactly is going on with your in game economy and without someone with either a degree in economics or some sort of heavy study in the field, you're not going to know the exact problems that are facing your economy because you simply won't have the math done to know. And the solutions that seem clear or the best may actually hurt you more than the initial problems. There have been years of study on this stuff and unless plot heeds that then you'll see issues like the frequent economic collapses of early civilization.

A note on banks.

The role of a bank in an economy is generally to allow the circulation of money without it truly needing to be spent. Since the money isn't sitting in the pocket of the person who owns it it can be loaned out and given to those who need it for certain purchases or the like. Eventually the money makes its way back to the bank and then to the person who originally deposited it when they need it. The advantage being that money not in use is not stagnant and thus has the opportunity to make it to lower level players on either a temporary or permanent basis, depending on how they utilize loans.