That'd be the 'bond' whereby they take their passports away, force them to work 12 hours a day, six days a week for a pittance well below what they were promised (in appalling and dangerous conditions, of course), leaving them bound by debt to their employers and legally unable to appeal or demonstrate due to having pretty much no rights?
That sounds pretty much like every working man's conundrum in a nutshell, imo.
"Plenty of strikers can score goals," he said, gesturing to the famous old stands casting shadows around us.
"But a lot have found it difficult wearing the number 9 shirt for The Arsenal."