That is just right-wing/conservative BS spin.
With UBI, people can afford something over and above "bottom rung of the ladder" subsistence, which leads to them being able to afford necessities of life that they might have to go without. This means they spend more... if they spend more, they pay more tax. The businesses they spend it with do better, and they also pay more tax, and they have to spend more with their suppliers to cope with demand, so the supplies pay more tax. That works its way up the chain, to importing and manufacturing and services. The increased tax take means the government has more to spend on things such as social programmes, health, education and services. Less poverty also leads to less crime.
Its a philosophy which holds that everyone is important and no-one gets left behind, that can only be a good thing for society as a whole.
Most people in the target group don't actuall pay tax when you take into account WFF and home subsidies etc, apart from GST.
And the govts here including the Jascia haven't exactly shone in the less poverty less crime department.