Around £570 million was spent on overseas players this summer, while not a single top-six side recruited an English player during the window.
England are 25/1 with Coral to win the World Cup
"I used to think that top-class foreign talent would have a positive effect on our young English players, that they would improve rubbing shoulders with them," Adams told Zapsportz.com.
"However, the reverse has become true, it has had an adverse effect. Buying up all this foreign talent is like buying the England team a ticket to oblivion.
"Unfortunately the young English talent has not come through and I'm worrying that they have become swamped by the sheer volume of foreign imports.
"We need the young talent to emerge and gain vast experience in the Champions League, but we now only have a smattering of English players in the Premier League, it's 36 per cent, but I think it will soon be down to 25 per cent."