The France defender told GQ magazine: "One young player asked me about an expensive car he wanted and I said 'save your money, look after your family and then think about cars'.
"When I started playing, I saved my money to buy a nice house for my family. But now these young players all want a BMW or Ferrari when they are still only 17 or 18.
"They don't have to work as hard as I did. It might not be their fault but it is wrong."