Shouldn't economic reality be a factor in the decision process?
Yes, but who's reality are you going to choose to use?
Economic realities are created, they are not immutable laws of physics.
Businesses create their own preferred reality. Unions force businesses to alter their preferred reality, in order to improve the standard of living for their members.
Case in point, UPS and FedEx. They both operate in the same economic system, but the employees of UPS have forced UPS to alter their preferred reality, to have a workforce available.
The reality that is currently forced upon the employees of FedEx (Express and the misclassified drivers of Ground) creates a markedly different experience for them compared to those who work for UPS - FedEx employees have that different reality forced upon them, since they have no voice in shaping that reality under which they exist. They have to operate under the "Vision of Fred", or leave - there is no negotiating.
Economic systems can and are shaped to meet the acceptable norms of conduct of society of a whole. Unions play an important role in this process - a role which is both more critical than the role played by government and more efficient to boot. Things that are taken for granted in the US by businesses are unacceptable in Europe and in many cases outright illegal. The allocation of resources and income in Europe is much more equitable than it is in the US... This is because the chosen realities they operate under are markedly different. Look at how FedEx broke the work stoppage at CDG. FedEx couldn't outright import labor to break the stoppage (violated French labor law and norms), they had to move the replacement labor to Cologne Germany, THEN re-route the network to use Cologne as a hub as opposed to Paris.
Businesses don't have to employ illegal labor in the US in order to get work accomplished, they do so because it is more cost effective and they can get away with it. I work my tail off because I couldn't get away with holding up banks for very long. I'm forced to operate under societial norms and laws in order to enjoy the life I do. If I could make a living by holding up banks - and not have anyone stop me - I'd seriously look into it.
If it were to become socially unacceptable for businesses to employ illegal labor in this way (or for legislation to be passed which would make this practice prohibitively expensive to even contemplate), then it would stop, a new "reality" would be created and the work would be performed by US citizens at a wage rate that US citizens would accept. If enough companies were be FORCED to operate in a more socially acceptable manner, then the equilibrium wage rate would rise to the point where product/service pricing would balance with the cost of imported products. Since the US economy is predominently a service economy, wages have the potential to rise considerably. Low wages exist because business can get away with it and they value their shareholders more than they do the labor. Unions help to redress this imbalance.
As I said, UPS cannot continue to compensate its wage employees at current levels as long as the conditions within FedEx Ground are socially tolerated or tacitily sanctioned by the US legal system. The IBT has managed to get premium compensation for the UPS drivers established. But this won't continue for long if the imbalance that exists between UPS and FedEx labor continues. UPS has proven that middle class jobs can be maintained within a package delivery network. But if FedEx is going to get away with violating societial norms of conduct while the US legal system does nothing, then hard economics will dictate that UPS reduce its compensation levels in order to stay in business.
The upcoming PRIMARY battle the IBT (and its members) have ISN'T with UPS management - it is with the FedEx business model. For as long as that business model is allowed to exist unaltered, any ground the IBT manages to hold now with UPS, will be lost in the coming years due to the economic reality imposed by the existance of Ground.
Since the IBT did a run away act last week wih Ground, I'm not confident the IBT will be of any use to labor in the coming years. A "play it safe" mentality will only delay the inevitable.