(I’m from Europe, have lived in US the past 8 years)
> Is there a concept equivalent to US, salary employee?
Yes. It’s called full-time employee. This encompasses anyone and everyone who does not work as an independent contractor.
> If so what are they expected to work?
40 hours per week.
With mandated minimum lunch time and breaks, paid minimum vacation, paid medical leave, paid maternity/paternity, govt mandated lunch allowance, govt mandated transportation allowance based on commute distance, and many other “perks” that US companies use as negotiation tactics.
If you work more than 40 hours per week, you can request overtime pay. Many employees waive the overtime thing for various reasons. In some industries because they’re exploited (restaurants and such), in other industries because they’re Mission Driven and want to work more (startups and such).
The law is there to protect you, but in practiceit comes down to your relationship with your boss.
edit: Personally, I don’t like this paternalistic/maternalistic attitude from either approach (as laws or as perks). Just pay me a shitload of money and let me figure out the rest. I’m old enough to buy my own lunch thank you.