It's not just for kicking a ball around though. The very top echelon of players also bring other benefits to the clubs they play for by mere association. These players attract top investors and club sponsors, thereby earning the club additional funds over and above the prize money they earn in football competitions.
Are they worth it? Well, they must be - otherwise the clubs wouldn't be paying the amounts they do. In the crazy current world of celebrity, that's the price that's paid for success.