While that's true, just money and influence aren't sufficient for this. Congress passes laws, but its upto the Executive to interpret it. The lack of breaking up of larger corporations has indeed been due to their significant influence, but I'm interested to see how e.g. a left-learning President like Sanders or Warren would use the powers of the Federal Executive (specifically the Justice Dept) to enforce existing anti-trust laws. Probably the only thorn in their plan would be SCOTUS, and its possible that its current makeup might make it amenable to the influence of corporations (its not clear to me if it will).
http://2oqz471sa19h3vbwa53m33yj-wpengine.netdna-ssl.com/wp-c...
Or how Bell is now ATT and plenty of other useless oligopoly companies?
Google could be asked to do the same with some of their product lines/companies.
It's very unlikely though. These companies have a lot of influence and a lot of power .. and when was the last time the Federal government broke up a company over antitrust violations? It didn't happen with Microsoft .. and for examples of really big monopolies, you'd probably have to go back to the Bell/ATT days.