I don't really care if people believe it for xenophobic reasons or not. I'm making a strictly logical argument here.
I'll rephrase. Let's say the Premiership is foreigners-only, and the Championship is British players only. The Premiership is added in 1980, when there are very few foreigners in the Premiership. What happens to the standard of the Championship? Clearly, it hardly changes at all. How can it? It has all of the same players. There might be an alternative cause that makes the players become worse: being paid less, for example, or inferior facilities. But that's not a type of case I've ever seen made- those examples wouldn't add up in real life, and whichever alternative cause was identified could probably be solved directly.
So if an all-foreign Premiership doesn't make the standard of English players worse, how can a partially foreign Premiership? It doesn't add up. It's almost unique in football by not being a matter of opinion. It's just wrong, in the same way that 2+2=5 is wrong- you can prove it false from starting assumptions that everyone would agree on.
No, because it's not that simple and the starting assumptions are true only to a point and not true all the way.
Foreign players help raise the standard of the premier league and also help the level of domestic players in that their quality is different, and perhaps at a higher level. That is the kind of starting assumption you might agree with. But it stops being true once the quality of the foreigner isn't high enough to do that. I think there is a tipping point where there are too many foreign players that aren't of a particularly high enough level to be said to be improving the level of the league; where instead maybe initially inferior English players could be given experience to improve in trying to adapt to that high level. At the moment, only the young prodigies of English talent really are getting a shot. And if even they don't hit the ground running at the top clubs their careers could forever take a different turn, perhaps away from a level they could have achieved.
Take Sturridge, he's always been considered a big talent but
even he really never got much of a shot until Liverpool decided to get him. At 24 he's finally getting his first season at a top club, with top talent around him, entrusting him as their first choice forward. At Chelsea, despite the fact that they've spent millions trying to replace Drogba with a player worth a damn, he wasn't getting a proper look in, even when he
was scoring when playing. They'd simply play Torres.
It's gotten to the point where you are either a child prodigy playing in one of the top English clubs, or you're simply not gonna make the grade and play for the lower level clubs. You're going to be stuck playing with inferior players around you and you'll never get the experience of playing against players of different styles or of even higher quality in different leagues (intercontinental tournaments).
It's very different learning your way in a club like United compared to one like Hull, for instance. The clubs share completely different cultures in terms of winning, playing, confidence, withstanding pressure/expectation, and many other intangibles. A good player can learn to become great there. That's far less likely to happen at a club like Hull (sorry Hull fans
). That's why someone like Ricky Lambert is such a novelty. So your scenario is shortsighted (the all foreign PL and all english CC) because if United is a club using all foreign players; that is an ENGLISH club which is amongst the greatest in the country, because of all its resources and history, putting all their initiative in making the
foreign players better.
In essence, there is no middling range. It's a dangerous game to play when you're talking about national teams. You've simply set up a system where only the absolute best English players, from very early ages, get to the top level. That's great for getting prodigious talent; but some talent comes to fruition later (or would have if they'd been persisted with).
As I said, I don't think it's just this holding English players back; but it is a legit argument as one of the reasons why and bringing foreigners is a double-edged sword. In a related way you can see it through Aston Villa when you compare them last season and this season so far. Yes, last season they gave players (in their case youth) that maybe at that time weren't as good as many other players (as one could argue when it comes to English v Foreign players) but that one year of baptism by fire and scraping out of the relegation spots has changed those players forever. This year by contrast they look far more equipped to deal with it. In their first 3 games they stood strong against 3 of the best teams in the league.
The biggest conundrum in football (well, all sports) is identifying who can make that kind of leap or step up. It's something you can only guess at, at best, with the majority of players (some are prodigiously good enough to know from a very young age) and you can only find out by giving them a shot to prove themselves. But only a league which is giving enough opportunities to domestic players can ensure that the pool is large enough to catch and develop most of that talent. Not one that has simply set itself up so that only the most prodigious talent gets a shot.