I will almost always ask why the candidate left their last few positions (or is looking to leave their current role at a minimum). Rarely does a candidate give an answer that cements the "definitely hire" decision, but I've had a few talk themselves out of a likely offer. This typically takes the shape of story-telling where everyone else at three different companies was too blind to see their obviously superior talent and brilliance or three companies in a row where everyone was just too difficult to get along with. In both cases, while it's theoretically possible to be true, there's only one common element across all three companies and they're sitting across from me...

If the answer comes back as mostly pay/opportunity: I get it; that's a real problem in a lot of places and it causes a lot of ambitious juniors to change companies frequently; no concern.