It's impossible to calculate the cost and benefit immigration without considering psychic profit and lost. And the government definitely is in no position to make any calculations at all.
Anthony Flood has written a valuable study of the surprising failure of the Communist historian Herbert Aptheker to cite C.L.R. James's Black Jacobins, despite its clear relevance to his work.
Despite spending nearly $2 trillion, or 45% of the federal budget, every year on Social Security and Medicare, the feds are headed toward insolvency, and there is no relief in sight.
America's "defense" budget is really more than 1.2 trillion, more than double the Pentagon's official "base budget," once we include all the other related spending like that on "homeland security" and veterans affairs.