Even with open borders and a global economy I think UBI is inevitable; the real question is whether we get there through carefully crafted laws and human compassion, or whether we get there kicking and screaming through half-measures and bureaucratic red tape.
Throughout history there was always a way to use additional labor productively (more farmers more factory workers more whatever), so we based our method of divvying up our resources by how much you contributed. Well with robots and drones, and self driving vehicles, and computers taking over jobs that used to need to be done by humans that system won't work. When there's only 50 jobs for every 100 people who need to make a living, something's going to have to give. We've already decided that we're generally not ok with the idea of our populace starving or being homeless, so we need to implement some sort of welfare system, the question really is what form it will ultimately take.
Your local teen can likely perform basic PC repair service in exchange for a couple of bucks, or a day off of chores. If not, he knows a guy that can.
Shhhhhh, let me keep my niche of the market a little bit longer.
If it weren't for the fact I'd be put on a government watchlist for the rest of my life, I might even suggest that perhaps the issue is more complex than we think.
Like almost everything, the issue IS more complex than we think. Drugs, for profit prisons, whether or not 'hitting your kids' is acceptable. You name a topic and I'm sure I can come up with a half dozen different sides to it. As for the government watch lists, I'm sure we're both on a couple dozen already. There's just the matter of 'is this an issue people care about right now'.
In order to dial out, it is necessary to broaden one's dimension.