Unfortunately the periods in which meaningful competition has occurred in the USA are very scant and relatively short. Remember how the railroad barons paid pliant politicians to write laws forcing farmers to sell their produce to the railroads (at a suitably discounted price, naturally)? Remember how the auto companies were able to ensure that towns were zoned to ensure no one could walk from their home to the shops & schools they needed to reach, but had to drive instead? And how those same auto companies conspired with DuPont to add (totally unnecessary) lead to petrol, thus intellectually stunting hundreds of millions of people? The fact is, the USA has always been a haven for monopolists and US politicians have always been utterly corrupt. That's why Mark Twain, well over a century ago, wrote "America has the best government money can buy." We can deduce that for all the naive enthusiasm about change, the reality is that no meaningful lasting change is possible in the USA because it is so deeply and systemically corrupt. Unlike in Italy, however, the population is totally unaware because they are ignorant and eagerly drink the coolaid that lets them imagine they are in "the greatest country on earth."