The bible requires that employees be paid as promised. (at the end of the day in the culture of that time). I have no idea what he even means by “exploiting” workers.
He most likely means it the way Marx meant it.
Exploiting workers means, to me, Nike sweatshops overseas. Using illegals to work in the US so they cannot complain about safety or illegally low wages, or just because American citizens would require more pay to do the job. Amazon, from what I’ve read, uses economic uncertainty to treat its workers like dogs. Companies that move factories to communist, totalitarian countries where & so they can pay almost nothing are scum, and those who encourage them are offensive to God.
Not sure a Pope living in the Vatican has a lot of room for criticizing, though...