On progressive taxes: my apologies, i wasn't very clear. Yes I'm familiar with how it works, I just meant raise the bottom tax bracket. EG: first 30k is not taxed.

On economic systems: there are negative trade offs with scale, central planning, vertical integration. Less diverse ideas, can be slower. There are still middlemen just structured differently.

I'm not against publicly owned companies though, they should tend towards infrastructure and natural monopolies (rail, telecom, probably some tech...)

I disagree that it would be easier/more efficient to break up companies than to tax them as they approach that state of need. But I'm not against the idea.