I don't want to pay for other people! (I'm just summarizing what I'm reading here, I don't think this. Guess what. You already do)
We could save a TON of money and bureaucracy by wiping out all of the limits, checks, paperwork, etc.
I would quit my job in a heartbeat, (freeing up my spot for someone else) and focus on my own small business, hopefully growing it and enabling me to hire some more people. People don't want to sit on the couch. Maybe YOU do, but most people are creative and WANT to do meaningful work. They DON'T want to slog away for the man. Giant Surprise, I know. Startups would flourish under this system, because they CAN.
Many stay at home parents would actually be PAID for their efforts under a BI. This would be a giant boon to families everywhere, allowing one parent to stay at home and care for their kids. This opens MORE jobs, and makes sure our children are raised by US.
McDonalds and other crappy jobs would have to bump their pay. Who would slave away for a basic income when it's given for free? This would end a lot of really bad work practices outright.
I can think of more, but I'm supposed to be working right now....