Trade Union is an organisation# that fight for workers’ rights under capitalism. Their sole purpose is to educate the working class about the course of capitalist oppression and impose a limit of exploitation that capitalists could be put on #proletariat. However, it does not eliminate the wage labour or wage slavery, which is the essential form of capitalist exploitation.
They have little say in a capitalist society other than voicing up on the working conditions of the working class. They can’t intervene the labour demand accords to the state of production, the labour supply from proletarianisation of middle class and natural reproduction of the proletariat class, and the momentary degree of productivity of labour.
Due to this nature, trade unions often act against the advancement of technology or 202205211156# under capitalism which is reactionary. They could also fall into the trap in aligning with the capitalists in order to control commodities’ prices and fix the scale of production. And since they are under capitalist state#, it renders them as merely a defensive apparatus for proletariat especially during the capitalist economy crisis. Therefore, they cannot be viewed as the main force on opposing capitalism.
I think it is best to follow the practice of 202204211120# within trade union.