No, but given different circumstances I think he would. The "Your're fired" approach to management is really just the "you're executed" approach tempered by law. Similarly I suspect today's more ruthless politicians - Thatcher, Blair - would in another age have been chopping heads off. (Don't think Corbyn would have lasted long in such times).
Both are clowns but there are at least some sensible heads to keep Trump in check. Kim Jong Un has free reign and any questioning him are despatched in some manner worthy of a Bond villain.
In reply to MG: In different circumstances he might, but he hasn't. His attitude towards the Central Park Five suggests that he might have a liking for extra-judicial execution, but Kim Jong Un is definately the really deal.