Perhaps law firms could invite people with smaller cases to cooperate as follows: everyone contributes some amount of money to a pool and gives the description

Perhaps law firms could invite people with smaller cases to cooperate as follows: everyone contributes some amount of money to a pool and gives the description of their proposed case. Then the law firm chooses the best action to pursue using the pooled money. Then if they win, the proceeds are shared by the firm, and everyone in the pool evenly.