The cruelty reinforces the Calvinist belief that the individual has achieved their relative financial stability due to their own moral quality and their hard work and entrepreneurship. If anyone could become homeless due to the whims of the Capitalist system they could not believe in their own moral superiority and chosenness. So they believe homeless people are moral failures, lazy, whatever. This protects their ego and justifies their support for the system. As long as people are homeless because they are morally bad then the system works. But to believe that they have to act cruelly and violently towards the homeless to demonstrate to themselves and others that they despise the indolence and moral turpitude of the undeserving poor

tldr; We have to go back in time and stop the Protestant Reformation