Yups, this is generally true for cash incentive tasks. The higher the level of a task, the more difficult it is likely to be, and as a result, there may be fewer tasks available at that level and the reward for completing those tasks may be higher. This is because higher-level tasks typically require a higher level of skill or expertise, and as a result, they may be more valuable to the person or organization offering the reward. Therefore, the reward for completing those tasks may be higher in order to attract people with the necessary skills and expertise to complete them.