Earlier this month, reports that Indiana was gearing up for a fight between conservative politicians and organized labors brought echoes of Scott Walker’s Wisconsin to mind. The comparison has just become even more apt—the New York Times reports that Democrats opposing the right-to-work bill have decided to defeat it the only way they can—by refusing to show up for the vote.Since the measure is all-but guaranteed to pass in a vote, Indiana’s Democrats, like those of Wisconsin before them, have to fall back on stalling tactics like this, although they have not yet seen fit to flee the state.Labor’s fundamental problems, however, aren’t political. They are economic. In the private sector, labor unions can’t protect workers against automation or against foreign competition and over time workers have gradually drifted away from the labor movement. In the public sector, until very recently the economic issues weren’t real and organized labor was able to push for higher wages, more job security and better fringe benefits.Now more and more states have hit a financial wall, and even many Democratic cities and states are pushing back against labor demands. When there isn’t any money, the union can’t get you more. Should public sector unions lose the ability to bring workers the benefits and pay increases they (very naturally and understandably want), the public sector union movement will face the generational decline that private sector unions now see.For fifty years labor has been wielding its political clout in Washington and the states, and for fifty years the percentage of workers in unions has been falling. In the last few years the center of gravity in the labor movement and the center of the economic crisis has shifted from the private to the public sector. Otherwise, nothing much has changed.