Why don't employers provide auto insurance too? They'd get a much better deal via group rates, and we'd be 'better off' because we'd all 'pay less' for auto insurance, right?
The idea of 'benefits' in general being 'expected' from employers is, in itself, a bit crazy - just pay people well, and let them make their own decisions. I'd have thought 'free market' supporters would be all over that concept. Company 401K plans? Generally limit you to high-fee and substandard mutual fund options. Company health insurance plans? One or two options, not something which always fit people very well.
Employer funds in to an employee-controlled HSA was/is a decent middle ground, but HSAs in general seem like they're going to be going away or more limited in availability in the next few years under the Affordable Care Act, which is a real shame.