One interesting note here is that Hillary does better among those without a college education in every matchup. I'm used to seeing the partisan breakdown there flipped.
It's not unusual. Republicans have more $, and $ correlates with education. In the 2012 national exit poll, Obama did slightly better among those without a college degree than those with one. He led by 4 among those without a college degree, but only by 2 among those with a college degree.
And of course, if you go way back in time to the Clinton era, it was more pronounced (and closer to what we're seeing in the 2016 polls). In 1996, Clinton beat Dole by 14 points among non-college graduates, but only beat him by 3 points among college graduates.
There's a huge difference between having a degreed profession in which one is paid by the government (directly as an employee or indirectly as a contractor) and being strictly in the private sector. A physician who depends heavily upon Medicaid or Medicare, a merchant whose clientele relies heavily upon SNAP, or a chemist in the employ of a water district thinks differently about Big Government than someone with a similar job or business whose involvement with the government is with taxing or regulatory bodies.
In 2008 the connection between income and the vote was never so weak between the two Presidential nominees as it had ever been.