this is exactly why unionism was born. to allow a collective voice for workers which can stand up to employers. unfortunately due to a number of factors this is a declining factor in modern workplace relations.
Unions don't necessarily help. Look at pilots, for example: The unions are run by the pilots with the most seniority, and as a result those pilots get (a) all of the job security, and (b) most of the money.
we need some form of collective voice to return