That would really only be a problem if majority decided to not do anything and we had actual shortage, not just "corporations don't want to pay decent wage so they can't find people"

If the incentive is "here is basic income, you can afford flat on outskirts of the town or in some small town and basic necessities", there is still plenty motivation to do better and get better stuff (whether just for living, or for your hoobbies or interest), just not a pressure of taking first job you can find just to afford being alive.

So average person have option of just going on 6 month hiatus to learn some life skill, or artist have time to develop their skill enough to make art or music that gets enough interest to make it into income.