If you, as an employer, believe the upcoming strike is unwarranted, you can easily go to court and ask a judge to decide if the strike has sufficient cause.
And more often than not strikes are either forbidden of limited after a ruling.
Besides that, striking is relative uncommon in the Netherlands, since trying to talk eachother into a compromise is the preferred option (polderen).
Nowadays a lot of employers decide not to talk and a strike is the logical result.