&gt; You could have a basic income of $5000&#x2F;year and it would still work better than $5000&#x2F;year in means-tested welfare.<p>But BI of $5000 costs far more, because anyone can get it. You&#x27;d need to reduce the amount to keep costs the same, at which the argument that it&#x27;s better becomes weaker.<p>&gt;How is it an invalid argument? Passing unenforceable laws is futile and stupid. It fosters disrespect for the law and gives advantage to people willing to break the law when they know they can get away with it.<p>If it&#x27;s difficult but possible to break the law and get away with it, then laws and some enforcement deters breaking the law. E.g. it&#x27;s pretty easy to get alcohol under 21 and cigarettes under 18 , but the age laws make it harder than if there were no laws, which reduces the amount of underage drinking&#x2F;smoking. If you agree that&#x27;s a good thing, then the law is good insofar as it encourages that.<p>Or in the welfare example, it&#x27;s not <i>easy</i> to scam welfare, it takes time, organization, etc. Many people who would never try to scam welfare would sign up for basic income, because it&#x27;s official and there&#x27;s no risk of getting caught.<p>Of course, it depends on the ease of scamming, the benefit, etc, but the general argument of &quot;unenforcable-&gt;make it legal&quot; is invalid unless accompanied by those arguments.