The IWW, as an organization, is non-political and it does not interfere with political beliefs or activities of its members. It requires only that political views do not create division within the union. This rule enables workers of all political beliefs to join together without friction to advance their economic interests.
The IWW concentrates on direct economic action because history shows that whoever holds economic power also holds political power. The IWW believes that whatever is "given" to workers by politicians can as quickly, with interest piled on the "debt," be taken away. Only that which labor wins by its own economic strength can be retained.
The hard lesson, fully absorbed by the IWW, is that labor cannot depend on pie-cards, politicians or prayers. Labor can only rely on labor; if it wins it must win by its own economic unity and strength.