I think birthright ownership goes down a bit easier than UBI: Just like every citizen of Alaska "owns" some of the oil in the ground, and gets a royalty check every year, we could just say every American citizen "owns" a certain percentage of every corporation doing business in the US. Their monthly checks are not "free government money for being lazy" but rather dividend checks. (Republicans LOVE dividend checks but hate taxpayer money going to lazy bums.) That "ownership" could be held in trust (kind of like Social Security) so you can never sell it. It just supplies income every month for life. It stops when you die, so no fair leaving it to anybody.
Since it's based on GDP, it is also inflation-proof. For businesses, it's just part of the cost of doing business and affects all their competitors equally. We can add tariffs on items manufactured outside the US that go into the dividend fund.