A race ban punishes the fans and it diminishes the show, so the punishment is not just for the team. How big should the fine be? I have no idea. Maybe disallowing them to score points in the constructors' championship for the next race is a better penalty. Maybe that and a grid penalty. Maybe forcing them to run with only 5 gears is better. Maybe forcing them to run with tyre compounds harder than the other runners is better. Just don't ban them and punish the fans.That makes no sense. How big, or rather small, does a fine have to be to be less harsh than a one race ban, but still a meaningful penalty that the team can't shrug off and pay off out of petty cash?
Remember when BAR Honda were banned for 2 races in 2005? They had run with underweight cars. This was done on purpose because they used fuel as ballast and thought they were clever. Do you really think the Renault guys thought their car could go faster with 3 wheels instead of 4? If so, the Renault guys are idiots and should just fold their team and pull out of the sport. A mistake was made, it was not done maliciously or with intent. The car was released in the heat of the moment and this has been done many times before, many times without any penalty. Webber could have crashed with Räikkönen when the team released him and that crash could have taken out for instance the Williams pit-lane crew. This was not deemed dangerous by the stewards.