Well, your 'restriction' motivation is a bit conspiracy theory / disingenuous, but yes for many reasons communism at the level of nations doesn't work. Do we really need to re-hash that the leninists' revolution model was flawed over and over again? There is no disagreement here.

Instead, following your startup idea, we should foster worker co-ops, which already exist today and are compatible within existing nations. One example is the https://en.m.wikipedia.org/wiki/Mondragon_Corporation