Throwing your weight around will do more harm than good. Instead of working in your self-interest, think about what will be best for the entire team. Whether this means sharing profits or taking on more work is immaterial. The important thing is to support those who are integral to your own success. If the group isn't performing as well as you would like, put out a suggestion box. You'll get some valuable advice on improving operations. When everyone feels invested in their work, you'll get the results you want.