It is spent waiting on bags in the terminal.
Solve each problem independently and stop trying to mix them.
Also, we don't have to ban carry ons, we can use Hacker News and Reddit's favorite blunt tool - taxes.
Apply a large add on cost (taxes) for each carry on. The larger and heavier, the more add on paid.
This would also offset the fuel costs of carry ons.
Of course business users could just expense the carry on add on cost, which preserves carry ons for them
Checked luggage are weighed and accounted for at check in.
For passengers - just assume 136 KG (which is really generous) times (the number of seats plus total crew)
It is spent waiting on bags in the terminal.
Solve each problem independently and stop trying to mix them.
Also, we don't have to ban carry ons, we can use Hacker News and Reddit's favorite blunt tool - taxes.
Apply a large add on cost (taxes) for each carry on. The larger and heavier, the more add on paid.
This would also offset the fuel costs of carry ons.
Of course business users could just expense the carry on add on cost, which preserves carry ons for them