Unions work well if everyone can agree on the same wage, or the same wage increases over time, etc, or can agree on barriers to entry. Teachers unions, pilots

Unions work well if everyone can agree on the same wage, or the same wage increases over time, etc, or can agree on barriers to entry. Teachers unions, pilots unions, etc, generally agree on wage (usually some % increase per year of experience), and doctors which are harder to agree on wage because there is much more variation instead unionize with barriers to entry (stricter AMA requirements). I wonder which would be better for game developers. Barriers to entry or agreed wages.