Well, there’s the fact that a universal basic income could add as much as $2 trillion in annual expenses to the U.S. budget. Then there’s the question of whether such a program might disconnect large swaths of our population from the positive aspects of working for a living—a potentially toxic side effect. And finally, there’s little convincing evidence that large-scale technological unemployment is actually happening or will happen in the immediate future. Advances are changing the types of tasks and skills in demand, displacing many workers from jobs that have become obsolete. But the massive, automation-fueled job displacement cited as the prime justification for a basic income won’t actually reach us for decades, assuming it does come. (source)