Redknapp is worried about the next generation of English players.
"I'm concerned about the younger kids because I think we are ruining them," he told the Daily Mail. "These days, clubs are giving four-year contracts to 15-year-olds. By the time they are 17 or 18 they are on six grand a week. Plus bonuses and all that rubbish. It's crazy, and I think a lot of the lads lose that hunger. They get a professional contract and they think they've already made it.
"Sometimes you can't send them out on loan to a lower division club because they are already earning too much money. I was reading what Gary Neville said the other day, how at the end of each season you'd just be glad to be told you'd got another year. You felt like you'd won the pools.
"Today we make it too easy for them, and as a result they don't work hard enough, don't stay out on the training ground and work on becoming the best that they can be.
"When I was at West Ham as a kid, Ron Greenwood would tell us that someone would keep the training ground open for as long as we wanted to be there. We played on a concrete pitch behind the ground, doing shooting practice, playing five-a-side. Ron, who was the best coach I ever saw, said someone would always wait around to lock up after us if we wanted to stay behind and work with a football.
"I remember Frank getting some running spikes to work on his speed. He'd be there in the afternoons doing his sprints, getting faster. You don't find too many kids like that these days. They don't want to be out there all afternoon. I've told kids to get some spikes but I'm not sure they ever do."