everyone is looking for the money and in the society anyone without money has no respect, as of now the ultimate goal here on earth is to serve God then secondly is the goal to pursue money, as money is a necessity of life. people dont care how the money is made if they overlook people honor and loyalty.  football is a business just like other businesses. and anyone can take a decision by leaving their current club and going to a well paid club without minding the effect it wall cause to the team they are leaving. everyone is looking for an opportunity while they are still young and  useful. if that stage has passed, such opportunity may never come. it also gives the player the opportunity to discover the best in them and being recognized by the world