When you have increased wealth concentration flowing upwards and more involvement of profit machines in people's lives (healthcare, correctional facilities, food, environment), people on average are working harder for less pay with increased cost of living. This means less recreational time to blow stress off, less time for doctor visits (not to mention the fun games our federal government is playing with healthcare), and less time/money/emphasis to treat yourself spiritually/psychologically. I am hardly surprised this equates to higher mortality rates.
America has a huge problem spending money on the betterment of its citizens, and it is starting to show.