Bug and animal spawns are currently disabled while we track down the source of the NPC server crashes that have been happening lately. It has nothing to do with changing bug prices or spawn rates.
With that said, there are plans to change how much money the jobs earn in the near future. Bug catching will be the last one to be touched, as we're still not sure whether or not it will be moved over to an experience based leveling system or remain a starter job as it is currently. Right now there is no reason for players to do any job other than bug catching, which is not a good thing for the server. Even after doubling the amount that diamonds and crystal logs sell for in the last few days, bug catching still earns more gralats per hour without any need to level it up.
Having jobs be fairly balanced will allow players to choose whichever one they find the most enjoyable instead of being forced into a particular job because it earns the most gralats per hour. It will also allow us to keep item prices down instead of having new items cost more and more money.