Unions in Europe doesn't work as in the US. There isn't anything like a union job. Everyone can become a member of the union and the tariff is negotiated centrally between unions and employer organisations. Germany have had formal unions since 1850 and strong unions for 100 years.

The same story can be told about the Scandinavian countries. Decades of unions strong enough to force employer organisations to establish central frameworks for wages, working conditions across entire sectors of the economy.