The difference with tips is, to be paid tips depends on having a job at a waiter, and that is what makes tips effectively a subsidy; the value accrues to and is ultimately under the control of the business owner, even if they are never the ones holding the money. The draw of a restaurant job is wages+tips, and therefore the labor is paid for with tips.
With a UBI, the whole idea is that the payment does not depend on or have anything to do with employment status. If your job pays terribly and you want to quit, having a UBI makes quitting more attractive and plausible, not less.
The difference with tips is, to be paid tips depends on having a job at a waiter, and that is what makes tips effectively a subsidy; the value accrues to and is ultimately under the control of the business owner, even if they are never the ones holding the money. The draw of a restaurant job is wages+tips, and therefore the labor is paid for with tips.
With a UBI, the whole idea is that the payment does not depend on or have anything to do with employment status. If your job pays terribly and you want to quit, having a UBI makes quitting more attractive and plausible, not less.