Are we talking about unions or socialism? I don't see unionism as an inherently anti-capitalist construct. It's a contract amongst workers and business owners

Are we talking about unions or socialism? I don't see unionism as an inherently anti-capitalist construct. It's a contract amongst workers and business owners. As with all contracts, their value tends to be dependent on your individual situation. It's even possible for unions to be anti-socialist, by constraining access to a select few creating elevated wages for the in-group while shielding access to that value from the out-group.