I dont know. I know there's few things right wing zealots despise more than poor people, but Thomas and Alito would likely be alone on criminalizing existence because the other 4 consider themselves Constitutional idealogs. All it takes is a coherent "life, liberty, pursuit of happiness" argument. You cannot legally punish people for being.
The fact that the penalty for most vagrancy laws are fines also shows they're nonsense. Let's charge these people more of what we already know they dont have any of!