lorries carrying recycled paper

[Spare tyre]

As i drive about in the day i often pass lorries on the motorway that are carrying paper being taken to be recycled

why is it these lorries always have loads of gaps that allow the paper to fly out all over the show

I was running early for a call today so was slowly following one along the m27 and in the 20 minutes i was behind it there was a continuous flow of scraps of paper

why dont they get pulled for it, and who thinks the design is good enough?!