Interesting history, thanks for posting this. I remember the Italian restriction on foreigners but did not recall the precedent that led to its overhaul. Another tough variable that works against Italy is its socialistic tax policy. The top bracket of earners pay 43%, which is much lower than what it used to be but still comparatively high. Italy also taxes your assets, even if you hold them in a foreign country or earned them previously. If you compare the effective tax rate of ~50% to say, France, which is closer to ~35%, a player with a $5 million contract takes home $2.5 million in Italy vs $3.25 million abroad. (I think this the main reason why Donnarumma left Juventus, personally). So, the more Italian stars command in salary, the greater the incentive to play elsewhere. Serie A is left to subsist on young players and foreigners from nations with lower league wages (Africa and the Slavs in particular).