They're usually offered as an option for work-sponsored plans. You can get a low deductible plan that your work pays $1k a month for, or you can get a high deductible plan for $500 a month and the company gives you the other $500 into your HSA tax-free (oversimplified, of course).
They actually make a ton of financial sense, but too many in the US would rather overpay for insurance rather than have to shop around.
They actually make a ton of financial sense, but too many in the US would rather overpay for insurance rather than have to shop around.