The issue with this becomes that anti-trust then becomes the tool of the $CurrentRegime to break up companies THEY dislike. For example, part of the reason US

The issue with this becomes that anti-trust then becomes the tool of the $CurrentRegime to break up companies THEY dislike. For example, part of the reason US costs for healthcare are skyhigh IS because of US govt regulation. IF the only applied it to healthcare giants, but they won't, because they're not the companies the govt dislikes, also $$$. All this will do is end up giving more power to the govt to break up the only thing that actually has the capability endangers their power-hoarding : big companies. Ultimately, Govt IS the biggest company, and you rarely have a choice to switch. If I don't like Amazon, I can go to walmart, or local store. I can't just willy nilly pack up and leave the country. People support regulations (or hell, $MeasureX) until the govt comes for the thing they like, despite people like us telling them that eventually the govt will do just that. (Eg, abortion in the US : People like us were telling others that if they stampede on our rights, they will stampede on yours too, given the chance).