Sure, there will be groups of people who are doing that. But to commute 200km a day? That will be something like 0.0001% of all workers, I cannot imagine it's any more than that.
You'd be surprised. Belgium is weird. Lots of companies in Brussels, which is central in Belgium. And lots of people commute in. Every day, going and coming back.
The freeways are clogged every morning going towards Brussels and every evening leaving Brussels.
I can believe the motorways are clogged, it's a capital city after all - but who lives 100km away from their workplace, and why? I knew someone who did this in Germany, but his argument has always been that actually, this is "only" 30-60 minutes away on the autobahn depending on conditions(which I still think was nuts), but from what you're saying people accept 2-3 hours per day(!!!!) In a car just to get to work? That's nuts, and again, I really doubt it's common in any way shape or form.
The freeways are clogged every morning going towards Brussels and every evening leaving Brussels.