Comment by zigzag312

Being less efficient is also a problem, because if majority becomes less efficient (lower productivity), the overall wealth and economic growth of that society are going to decline significantly.

We do have evidence that when money is not a problem, we become less efficient. For example, monopolies or state run companies.

Just the first result from google: https://www.mdpi.com/2227-7390/11/3/657

Another problem with UBI is that, if we want for UBI to cover basic costs of living, these expenses are actually quite big as UBI essentially would need to cover things like rent, food and health services. Otherwise we will still have plenty of homeless people with UBI.