Your implication seems to be that the filing fee is the only resource bottleneck, but there are other resource-consuming tasks involved (extensive fact finding, legal research, finding and consulting with witnesses, plaintiffs, hiring local counsel, etc.). These things take time and money, even when volunteers are working for free in their spare time.
Your implication seems to be that the filing fee is the only resource bottleneck, but there are other resource-consuming tasks involved (extensive fact finding, legal research, finding and consulting with witnesses, plaintiffs, hiring local counsel, etc.). These things take time and money, even when volunteers are working for free in their spare time.