Earlier quoted context omitted.
After you become a permanent resident in a EU country, you are no longer legally a "foreign worker" but rather state services treat you the same as any native-born person.
So googling says this is available to apply for after 5 years for Spain. Which suggests that the health care benefits may not be substantially better for quite some time after moving. Especially if moving from the US and giving up several tens of thousands of dollars per year in salary. The last part of this sentence makes thing increasingly unclear-sounding: > You have to prove that you have adequate financial resou…
If you have been working in spain, you are covered by the spanish public health system which is your proof of public health insurance right there. Also, so long as you keep being an "active worker" (that means either actually working or inscribed in the public job-seeking people registry INEM) you will maintain your health coverage whether you are a permanent resident or not.