This may not come as a surprise to many, but America's most important social program, Social Security, is in trouble.According to the newest annual report from the Social Security Board of Trustees, the program has officially hit an inflection point. The intermediate-cost model suggests that $1.7 billion more in benefits and expenses will flow out of the program in 2018 than it generates through its three funding sources:This will be the program's first net cash outflow in 36 years.