Employers also often get better pricing on insurance for their employees because the pool is less risky overall. Those buying health insurance on the private market are more likely to have health problems and need it. Lots of healthy, young employees with limited health problems at tech companies.

Why isn't this just tax deductible?

When McCain ran for President against Obama in 2008, there was talk about making employer provided health insurance taxable as a way to even this playing field. The idea was more employees would refuse employer coverage and buy their own for cheaper.

Then a lot more poor people could get insurance, not very 'merican.