You know it'd break the cartel-like control companies have over employees if a law were made that all jobs must payout within the salary range posted for the jo

You know it'd break the cartel-like control companies have over employees if a law were made that all jobs must payout within the salary range posted for the job. That prevents people from negotiating higher pay than is advertised publicly, so employers would have to tell everyone what their maximum salary could be. Employers would have an incentive to post high maximums rather than miss out on quality candidates.