I personally think it's important that the police behave in accordance with strict rules, and don't go dishing out punishments as and when they see fit, as this allows for discrimination, and a return to the old days when it was common for suspects, particularly in minority groups, to "fall down the stairs" in the cells rather a lot.
Bloody 'ell, that was a long sentence.
The payment is to signify that chucking people's kids around as they see fit is not what modern policing's about.