Wouldn't people just collect UBI AND steal? The article explicitly mentions that most of the people doing this are also receiving state and feral unemployment benefits
Yes, they would. Great example: Turkish + Arab Clans in Germany. They usually collect benefits, aren't asked to work, and are heavily involved into crime.
For some reason, I just don't think the people described in this article are moving millions and millions of dollars of makeup and over-the-counter drugs every year in order to keep their basic needs met.