The Bureau of Labor Statistics' report on Union Membership in 2002 shows American labor unions suffering a loss of 280,000 members in 2002. A loss of 445,000 union members on private payrolls was masked by an increase of 165,000 in public sector unionism.
It is a fundamental law of economics that when the price of something goes up, people buy less of it. We see it at work in many ways in our daily lives. Opponents of smoking advocate higher taxes on cigarettes so that people won't smoke as much. When the price of gas increases, people drive less.