That was the case when Standard Oil was broken up and it's not a problem. The retail arm becomes free to get their cloud computing needs from others -- say Azure or Google. Bezos can't force them to get a worse deal at AWS simply because he owns the AWS. A lot of the arguments for breaking up companies come from this. It can make the components more efficient once they're freed from the shackles of being locked in. Likewise, the crappy parts of the big conglomerate can't coast on having a guaranteed customer. This is the whole point of capitalism. Monopolies are the anti-thesis of capitalism.

Did you read her proposal? There would be a structural separation from distribution and first party goods. Just like railroads couldn't own interests in the commodities they were transporting, Amazon couldn't operate a market place and also own private label brands.

https://medium.com/@teamwarren/heres-how-we-can-break-up-big...