You seem to be conflating number of hours worked with value produced. Working long hours doesn't necessarily imply producing anything more useful. You say "fin

You seem to be conflating number of hours worked with value produced. Working long hours doesn't necessarily imply producing anything more useful. You say "find excuses to avoid work", but you also talk about lack of skills - which is it? Getting stuff done without working long hours may imply really good skills. If this comes down to "I don't see them sitting in chair sufficiently long" then this is your problem, not theirs. If it's "they could be doing better things" then maybe you should have a conversation about which particular skills they're missing. If it's "avoids doing actually necessary work", again that's a conversation you should have with them.