Trickle down economics at work in Bengladesh

"Amal sells his black tiger prawns to middlemen for 500 Taka (about £3.50) per kilo. But just 10 kilometres away the middlemen sell them at a wholesale market in Khulna for 700 Taka (about £5). Needless to say, if Amal tried to bypass the middlemen, the musclemen would come knocking."