Why the steward policy at the FIA needs a shake-up after the Verstappen case

Perhaps it was a coincidence. But a fact is that Johnny Herbert was one of the stewards on duty at both Singapore and Mexico; two Grands Prix where Max Verstappen received a hefty penalty. Herbert, a British former driver, currently makes his living as an analyst and also - fair enough - free of charge as a steward assessing whether F1 teams and their drivers are following the rules. But in a sport where the stakes have become immense, the outcome of a race - let alone a championship - can no longer depend on people with multiple duties like Herbert.