With their record of finding elephant fields, "it becomes almost a statistical play at some point, " Musselman says.

FORBES: One Tamed Wildcat

With their record of finding huge fields, "it becomes almost a statistical play at some point, " Musselman says.

FORBES: One Tamed Wildcat

However the National Playing Fields Association (NPFA), which campaigns to protect open spaces for recreation and sports, says that it is "immensely disappointed" by the government's record on protecting playing fields.

BBC: Playing fields sell-out accusation

Others trap workers in low-paid fields such as child care, and some even signal to employers the holder's weak academic record.

ECONOMIST: Skills