Oh, yes, in the modern world, money rules the ball
Unfortunately, modern Italian clubs are by no means at the forefront when transfers with huge sums are made. Let's recall the situation with a player like Pogba, who can return to Juventus again and again as a free agent
Money is important to pay salary for players, coaches, keep them in a club, to maintain strength if not to enhance a club strength. Without healthy finance, a football club will have to sell their best players to opponents and it will reduce their strength within one or two seasons. If they can find good replacements, it usually take one or two seasons for new players to actually make good contributions.
Let's also recall the reasons why one of the most powerful Italian coaches left the champion Inter and found himself in a non-championship, but more financially confident club from the English Premier League like Tottenham. Money, of course, still does not solve everything, but it greatly simplifies the task and clubs with fewer finances have to take their toll on other factors.
Conte left Inter Milan because he did not guarantee a financial budget for transfer. He disagreed with the club plan and his ambition is to compete aggressively for Champions League. So when he realized that Inter Milan director board did not have a plan for that, he decided to leave the club.
Tottenham is just a temporary job for Conte I think so. He will move to a bigger club after he finishes his job in Spurs.