Trust busting can seem like it’s anti free market, but when a company has a monopoly on a network it stops functioning as a company and basically becomes a government. The problem with Facebook/Amazon/Google is that they have a monopoly on a specific information network, for Facebook the social graph, internet discoverability for Google, and online shopping for Amazon. It’s similar to if a single company owned the ro…
None of these things are a natural monopoly.
Facebook only stays relevant by buying its competitors. You don't even need to break them up, just disable acquisitions. Then Instagram would be separate, WhatsApp would be separate. You don't even have to break them apart, just wait for the next one and don't let them buy it.
Google is the biggest search engine but search isn't a natural monopoly. Their dominant position comes from all the vertical integration. Google owns YouTube and YouTube is featured prominently in Google Search results. To get Android/Google Play, OEMs have to use Google as their default search engine. To fix this you don't have to regulate the search results, just separate the search engine from the other companies, and stop allowing them to buy competing ad networks.
Amazon doesn't really even have a dominant market position. They're not a railroad, they're Internet Walmart. They're just the biggest player in a highly competitive market. They have no capacity to significantly raise prices or people would immediately switch to any of their hundreds of competitors. Most of the complaints are from competitors butthurt that Amazon is keeping everyone's margins slim -- but that's what they're supposed to be doing.
A railroad is a natural monopoly. You can't really break up a natural monopoly, so you have to regulate it, which is terrible.
None of this tech stuff is like that. The problems here come from consolidation through mergers and vertical integration. They're unnatural monopolies with clear lines across which they can be broken up without long-term regulation. Just stop letting them buy their competitors.