I like the idea of ending the current welfare system because it makes the recipient feel 'less' because they're on 'state assistance' vs everyone gets 3k/month + 500 per dependent per month.
We'd need a different tax system though, and need maybe VAT to offset it a little. It would move everyone above poverty though so pretty much everyone could afford at least some level of taxes. It would also give job mobility and more ability to negotiate wages. Some would choose to stay home and join esports leagues, or start an arts career or go back to school, or start a business. Meaning less people would be required by labor, meaning supply/demand would be in worker's favor -- which would drive up wages.
I think there's definitely a place for UBI on the table, AS LONG as single-payer and free college ALSO exist - -and college debt forgiveness.