For many immigrant workers, a day off from work equates to a loss in much-needed pay. Most can ill afford to loose wages and, therefore, will show up for work, even if they feel their presence is really needed at the march in their city. You also have to wonder if organizers were really able to get out the message and intent to the masses. It remains to be seen. All industries have to be prepared if this event does evolve and grow in participation.