Recruiting standards have been too high since 2007 actually. You're actually more likely to get in the military as a descendant of a middle-class family than from a poor family. And if you exclude the Army, that has been true since 2001 or so.

And post-2009 when active operations in Iraq were ending and the economy really went to shit it's gotten even harder to join. You essentially can't even get into the various Officer Candidate Schools without being either in peak physical shape (Army/Marines) and having good grades, or having a GPA of 3.4+ with good physical scores (Navy/Air Force).