"Proof of work" is the straightforward answer to this; not in the sense that it's used within cryptocurrency, but purely in terms of: does an individual contrib

"Proof of work" is the straightforward answer to this; not in the sense that it's used within cryptocurrency, but purely in terms of: does an individual contribute value and take on some/most of the effort to investigate and understand the issues they're assigned to (or volunteer for) themselves? If not, that's not necessarily a sign of malice -- patience and education are worthwhile and usually the answer, especially in calm times -- but if your organization is under time pressure (and has sufficient staffing capacity available) then proof-of-work can be a signal to aid allocation of focus/time (or to navigate away from a problem).