Instead of changing the balance in favour of the unions, prohibiting employers to use scabs brings the forces back into balance to a point that favours more reasonable negotiations where both employer and union work to quickly find a common ground, develop relations that will enable them to reconcile their divergent interests and find solutions that reflect their convergent interests.
Union forces are mentioned in this piece
( z1 mention :ARG1 ( z2 force :mod ( z3 union ) ) :location ( z4 piece :mod ( z5 this ) ) )