>The loads hauled by these truckers aren't going to magically vanish because the employment laws have changed, which would strongly suggest there will be about the same number of jobs in the end, since the same amount of work still needs to be done.

Well, not by magic, by well understood economic principles. It would be very unusual for the demand for shipping to be inelastic to price. So as prices rise due to labor cost increases, demand will fall.

I'm not advocating one way or another. I'm simply saying the impact can be reasonably anticipated.