I agree 100%. But they're not getting shafted by the drivers -- they're getting shafted by Arrow.
If I'm a driver, my primary obligation is to my company -- not their customers. If my company screws me and I think my only way to recover what is owed to me is to hold the company's assets and loads "hostage," then so be it. I find this kind of "can-do" spirit sort of refreshing, in fact.
The problem with that approach is that you end up on the wrong end of criminal liability. “He who sells what isn’t his’n, must buy it back or go to prison.”
In the U.S. wage claims are privileged in a bankruptcy vs. other unsecured creditors (assuming the company has any assets) so the drivers may get something, eventually.
The situation sucks, but taking it out on the shippers sucks, too. The drivers are clearly in a no win situation, but that happens to everyone once in a while. It would be a bigger mistake to compound the situation by getting a criminal record. Especially considering that a record for stealing freight would probably bar you from employment with any other trucking company if their insurers have anything to say about it.