Rules changes affecting how well an o-line can run block vs pass block are needed to create demand for RBs who can then demonstrate a higher value over replacement while it becomes harder to demonstrate value over replacement in the passing game at the same time. A Mercedes AMG is not needed when the o-line can successfully block for an AMC Pacer. Such action by league ownership would help modulate the huge paydays for QBs, WRs, and left tackles as well. However, you then have to answer the question of why ownership would do this, given that the overall payroll pie is unchanged. The players union can help achieve this by rattling the cages for shorter rookie contracts and pushing to abandon franchise tag concepts.