In reading Harold Meyerson’s lament for the decline in unionization [“When unions disappear,” op-ed, June 13], I was disappointed that he neglected to note that private-sector unions are a separate species from public-sector unions. It was Wisconsin Gov. Scott Walker’s restrictions on public-sector collective bargaining that caused the unsuccessful recall attempt in his state.

By reforming how government employees can negotiate for taxpayer-funded benefits and ending automatic collection of dues from worker paychecks, Mr. Walker (R) angered public-sector unions such as the American Federation of State, County and Municipal Employees, which has since lost 55 percent of its membership in Wisconsin, according to the Wall Street Journal. If workers choose not to join a union voluntarily, perhaps it should fade away.

Richard Lorenc, Chicago

The writer is the co-founder and executive director of the Liberty Markets Fund for Freedom.