Denmark, Finland, Iceland, Norway and Sweden. None of these nations have an minimim hourly wage enshrined in law. Instead many of the base terms of employment, including wages, are decided via collective bargaining between sector trade unions and representatives of public sector and business interest organizations.
I live in Sweden by the way, so feel free to ask me questions on the topic and I’ll do my best to answer.
Partly, but there is more to collective bargaining than that.
a) Indexed inflation levels tend to be underreported (exactly due to things like this)
b) it does not allow for over-time adjustment of real wage levels. As productivity increases, the real wage usually goes up. During periods of economic crisis you often see the largest wage increases in absolute terms, but a decrease in the real wage due to inflation. These negotiations are the toughest.