Wow.

A literal wage cage.

… Damn.

first nation to ban time travel as far as i know

Ez fix: just take the cage door off before you transport people?

Around 500 to 1,000 out of 50,000 lorries in Singapore have caged decks. Such lorries may still be used to transport goods.

If only so few even exist, I wonder how many of them have been used to transport people