The Haymarket bombing delayed the attainment of the 40 hour work week for years according to labor leaders of the time.If the marching has no effect, I suspect violence will be forthcoming.
This is, after all, pretty much the history of labor struggles.
They start out as protests and strikes, and sooner or later some hotheaded unionist or cop loses his cool.
If history be our guide, the harder the corporatists push the harder the working class will push back.
False-flag operations from both sides in Wisconsin could change the dynamic in ways we can't imagine right now.