Whole Amazon is worth <200 billion. Divide that by 325 mln US citizens and divide it again by 1000, that's for how many months worth of basic income you could get if you just seized all Amazon assets.
https://www.cnbc.com/2018/01/21/ten-largest-us-tech-firms-2018-revenue-seen-topping-1-trillion.html … Change 200 billion for 2000 in initial equasion. Keep in mind that it's a one-time feat. After it's done you'll have no tech companies since you've ransacked them all and everybody who survived that ran away to China or Mexico.