Striking city workers and striking Hollywood actors have this in common

This summer of labor solidarity isn’t just limited to private-sector employees — workers in the public sector are taking action, too, continuing a years-long trend.

Striking Hollywood writers and actors joined 11,000 striking Los Angeles city employees on the picket lines during the public workers’ one-day strike last week. About 4,000 city employees in San Jose, Calif., in the heart of Silicon Valley, are set to strike for three days this week.

Some…