This is not that hard -
What do you want?
Higher wage rates for some workers with higher unemployment and less total wages (all jobs combined)?
Higher total wages (all jobs combined) and higher total employment - but some individual jobs pay less?
Take your pick -
But don't tell me you want strong unions and a lower unemployment rate and more in total wages paid.
If you increase the cost of something less of it will be demanded. Unions increase the cost of labor.
Wages are sort of like gasoline -
Some will be used even when the cost is really high -
If gas was $10 a gallon many people would still buy it - have no choice must get to work - but over time people would figure out a way to use less gas.
If labor cost was $20 an hour higher - some people would still have jobs - but over time companies would find ways to reduce head count.