Luckily every study at every scale on UBIs has not found any loss in motivation. What it actually has shown is people use the financial breathing room to train up and get better jobs, thereby societally paying back more than they put in, in the long term. The kind of society that can implement UBI can also tax the rich intelligently and fairly.
Is this not completely illegal? Dunno about the USA, in the UK age is a protected characteristic and you would be fucked for trying this. If it's real ofc.