Via the Wall Street Journal:
Many employers are betting that the Affordable Care Act's requirement that all Americans have health insurance starting in 2014 will bring more people into their plans who have previously opted out. That, along with other rising expenses, is prompting companies to raise workers' premium contributions, steer them toward high-deductible plans and charge them more to cover family members.
The changes as companies roll out their health plans for 2014 aren't solely the result of the ACA. Employers have been pushing more of the cost of providing health insurance on to their workers for years, and firms that aren't booking much sales growth due to the sluggish economy are under heavy pressure to keep expenses down.