Give examples where an unresolved labor dispute led to dire social and political consequences.

If a solution to the labor dispute is not found, the labor collective has the right to strike.
A strike is a temporary voluntary refusal of employees to perform their labor duties (in whole or in part) in order to resolve a collective labor dispute. The decision to strike is taken at the general meeting of the labor collective by at least two-thirds of votes.
The administration must be warned about the strike in advance – no later than two weeks before it starts.
None of the collective members can be forced to participate in a strike or to refuse it. During a strike, its participants do not receive wages. In the process of resolving a collective labor dispute, including a strike, the so-called lockout is prohibited – the dismissal of employees at the initiative of the employer in connection with their participation in a collective labor dispute or strike.