For those who may not know, "Cloward-Piven" is a reference to this pair of authors who, in a 1966 article for The Nation, suggested that, by overloading the half-capitalist/half socialist welfare state with hordes of new clients it couldn't possibly take on and insisting the moral argument for the system nontheless remained intact, the Left would force the country to abandon Constitutionalism and embrace the socialist utopia Marx dreamed about.
It's important to note that the human tidal wave flowing across the Mexican border this spring and early summer is not accident. They were invited here with (relative to the hellholes they fled) lavish benefits, medical care, special perks (i.e., in-state college tuition), legislation like the Dream Act, the President's "I got a pen and I'm not afraid to use it" executive orders directing deportation for only violent illegal aliens (the rest get to stay as part of a "triage" application of limited resources to problem that exceeds capacity to deal with it), the lowest deportation rate since 1973, and even attorneys to advocate for them in US courts. Little wonder then that word gets around in Central and South America to the effect of "come to America with your children, you won't be turned away".
Even the numbers are favorable to securing the border, relative to the crushing entitlement bill. What our country lacks is the political will to stop importing future Democrats.