Not to belabor the point unnecessarily, but Social Security checks are generally injected immediately back into the economy as well, and Medicare-while it does

Not to belabor the point unnecessarily, but Social Security checks are generally injected immediately back into the economy as well, and Medicare-while it does help prop up the least fiscally efficient medical system in the world--does, at least, get spent in the US. Defense and Homeland Security spending benefit some companies at the expense of others; that's an effect with debatable benefit. The debt interest supports the GP's other point, that the money would be taxed or inflated away eventually, anyway.