This is a bit like saying "the government is corrupt so lets we'd be better off without it". Better with union representation than without, though better with u

This is a bit like saying "the government is corrupt so lets we'd be better off without it". Better with union representation than without, though better with unions who actually represent their members than corrupt unions. The union exists at the point of confrontation (or negotiation) between employer and employees, and there is every reason for the employer (who doesn't want to negotiate) to undermine the unions. This can lead to both actual corrupting influences, and constantly spreading the idea that the union is corrupt, is a 'drag' or a 'burden', in order to undermine its strength. The last thing I'm saying is that current union structures are ideal and devoid of corruption (and what little I know about US unions, the case is worse over there), but that organised, collective struggle is what wins gains for workers and that unions are often the best vehicles for to push those struggles forward.