The former Juventus and Chelsea forward believes that the increased number of non-homegrown players is limiting the chances of young Italian players breaking through
The 50-year-old - who previously turned out for Juventus and Chelsea - believes that the increased number of footballers being signed from abroad by Italian clubs is limiting the chances of homegrown players at top sides.
When Vialli was involved in the Scudetto race, only three foreign players were allowed per team and the ex-attacker wants to revert to the format where Italians are prioritised.
He told La Gazzetta dello Sport: "Within the rules anyone can work as they want, with the utmost respect for Udinese, who have created a healthy and sustainable model by getting players from all over the world.
"But I'd definitely return to the football of the 1980s. You can do it by choice, even if regulations don't demand it. It's better to have three foreigners because you can find space for Italians.
"There are also the Champions League rules, where you need a number of 'natives' and some who come through the academy."
Vialli also believes that Antonio Conte's departure from Juventus, who have dominated the Italian league recently with three consecutive Serie A wins, has weakened their chance of keeping hold of the Scudetto this term.
"Conte's Juve was a single block composed of the coach, the team and fans," he remarked. "Now that a piece is gone, we'll see if Massimiliano Allegri will be able to recreate that symbiosis.
"In any case, the other teams believe they can now compete, and this is important."
When then asked about Roma's chances of breaking Juve's hold over the Scudetto, Vialli added: "The way Rudi Garcia makes Roma play, I like very much.
"Then Fiorentina, which I think have reinforced, and Inter, whose transfer dealings have convinced me. With AC Milan, I see a new beginning. Filippo Inzaghi will exploit the team by giving his enthusiasm."