The real-life translation of this:
In school projects ("groups"), two members of a five-member group do all the work, and the other three show up at the last minute to claim the credit.
In work situations, see above.
The six stages of a project
1. Enthusiasm.
2. Disillusionment.
3. Panic.
4. Search for the guilty.
5. Punishment of the innocent.
6. Rewards for the uninvolved ...