"Either you're good enough to get in the team or you're not. It's as simple as that."
While Sir Alex Ferguson was often happy to promote youth, and included 18-year-old Adnan Januzaj on the bench for his final game in charge at West Brom, that has not always been the case at other clubs striving to match the success of the champions.
"I think the problem in getting youngsters coming through is that clubs want instant success," Whiteside explained to ManUtd.com. "They want to win things yesterday not tomorrow and I think it's harder for kids coming through.
"They've got to be exceptional today to get into a team at 16 or 17. It can be done - don't get me wrong - but big clubs and other clubs with money are looking to Europe. Maybe they're not buying top-class European players but looking to Scandinavia and elsewhere and that's blocking kids from coming through in England.
"I'd like to see more kids being given a chance in the Premier League and a stop to buying too many people from foreign countries. While I'm all for signing big players as I want to see great football and the best players, if they're buying mediocre players from Europe then they are blocking the youngsters from coming through. I think they should target youngsters and give them more of a chance."