Those with skills tend to stick together and treat the skill-less with disdain. The skill-less resent their situation and often stop listening or get distracted.
This is one of the reasons I referred to the series Survive This -- that tendency is very much on display. The kids with skills band together and ignore the kids without them; the kids without skills tend to slack off.
Another thing that happened was that the kids with skills got into a rut of doing certain things, often taking easy jobs like gathering firewood and delegating more difficult tasks -- and then complaining when the kids lacking skills failed at the more difficult tasks.
The most important thing you can do to win trust, if you have skills, is to help people out. This didn't happen.