strike for something—
1. stop working for an employer in order to get more pay, better conditions, etc.:
- After the airlines show a profit again the unions will strike for higher wages.
2. fight for a cause:
- Cleomenes followed by a few friends rushed through the streets of Alexandria, exhorting the multitude to strike for freedom.
strike over something—is used with reference to the issue that causes the strike:
- Workers including technicians, lighting and box office staff are among those who opted to strike over the redundancies.