But the only reason they got caught was that he wasn't helping on the descent himself.Yeah, hopefully the tiny winning margin over a not that great sprinter will make Mathieu more hesitant to convert himself into a domestique in a freaking monument in the future.
That said; they were caught before the finish of the descent, and Mathieu seemed to have enough to do following Pogacar. So he probably didn't back himself too much in the five-man group that emerged at the bottom.
Also it's weird to pay him back when he's literally done more work for Philipsen than vice versa.