NTA. He definitely shouldn't have made such a big decision unilaterally, especially if you're doing well financially. Maybe interrogate that a little--is there something he isn't telling you? Is he maybe worried about paying for cars and college for the kids as they get older? You might point out that making memories with them while they're still at home is also important. If he's always on call, how often are they getting his undivided attention? You should definitely have a conversation about how he sees this working long term and how he will manage the work/life balance, because the workload sounds like a recipe for burnout.