As the program right now is speculation the UBI is generally applied to only adults, or persons in the age of majority.
I haven't looked into how many of the pilot programs were calculated but some actually provide a lesser amount to couples. So If you or I as an individual were to receive 13000 as a couple we may receive 21000.

I'm not going to lie if the only thing keeping someone at there back breaking job is that they "need" that amount if money, I think them being able to take a lesser wage for the trade off of better mental health or less hard labor good for them. This would allow people to make decisions based on more than the dollars earned.

As with any system there will be people who try and abuse it or give it a bad name. I personally feel the overall net benefit will be a society that has improved mental health, and a stronger workforce because at the lower to medium skill jobs people will make a choice not just accept circumstance.

To hellfish's post about donating.
That was refreshing to see and something I had not considered. I like the idea that there are some out there who realise what they have is enough and would be willing to use this as an attempt to help lift others