Giving away cash won't make people lazy; rather, it will motivate them to maximize their take of the action, while minimizing someone else's. Scores of people claiming to be poor will suddenly appear out of nowhere, with outstretched empty hands.
It being "Universal" means that people don't have to claim to be poor. Now, because we have progressive taxation, claiming to be poor would indeed be advantageous - but that's true even today.