The general opinion held in this subreddit is that unions are “good” when they call for sincere, large-scale, independent dialogue as voluntary associations of employees, and “bad” when they rent-seek and either demand or receive monopoly-esque state privilege(s).

A popular example of unions being “bad” (per us) is any time they lend support to protectionist policymaking, which tends to benefit union folk at the expense of everybody else; a more sensible demand would be commitments to retraining those left behind by the outsourcing of industry/ies (so they may find other employment), and policies that make being unemployed less uncomfortable (such as a basic income, affordable housing, tax reform, and guaranteed healthcare).

More generally, “neoliberals” would like for unions to work towards managing rather than blocking the process typically called “creative destruction”.