We all know having money is great on the server, but in reality the money system is ruined. I remember back in the old days mobs would give you a couple dollars and the all mighty giant gave you a wonderful 10$ or was it $25? Now you can just type your name, some letters, and click Vote! and you get yourself a nice 500$ a day for advertising the server (which in no way is a bad thing). So what I'm suggesting is either raising the monetary value on all things in the server, eg. Houses are now 500$ a block, PokeMarts increased all goods value by 35% and whatnot. I mean I logged in today and I typed /baltop to see some completely random player have over half a million dollars which would be unheard of in the past. See if makes you have to work for what you want instead of clicking a couple vote links everyday until you get enough for what you want. Back in the day we used to farm mobs like crazy to just get at least 1000$ a day or so.
Also add more uses for money as now it's either to buy a house, buy items, and of course gamble. Boring isn't it? Maybe adding a couple cool features like /pay server 500 and for a limited time right clicking with your stick lets you shoot call down lightning strikes that hurt only passive or aggressive mobs. Add a real bank system where people can deposit and withdraw money, but if you choose to keep it all your at the risk of anyone /theif Equin0x xxxx where higher amounts are more difficult to thief and you have a 3 thief limit daily. People can get loans and must pay back in a period of time or risk losing 100$ a minute or 500$ and hour even going into the negatives. And making the bank universal so even though you deposited lets say 457$ and someone withdrew 200 and the bank only had 500$ stored in total you must wait until the bank receives the money back. Interest would be a good idea too like maybe +0.015% gained every week. Well I dragged this too long so let's see what the playerbase thinks of this. Remember change is good and adds possibility to many new and fun things, sticking to the same old thing gets boring and is what causes a lot of people to leave.