The consequences are consistent. If they engage in an illegal merger and someone sues them they'll be subject to the remedy of that court. It's really not that

The consequences are consistent. If they engage in an illegal merger and someone sues them they'll be subject to the remedy of that court. It's really not that complicated. That's how civil and business law is typically enforced. Your premise is that when a business deal is "approved" it's all set. But that's not really how things generally work, your premise is dubious. The real way things work is people do things and then if they cause unlawful harm they end up getting sued, sometimes by the justice department sometimes by a class action sometimes by someone else.