That you have been involved in the project doesn't mean that you know where the real cost sinks are. The role of unions are discussed extensively in the linked

That you have been involved in the project doesn't mean that you know where the real cost sinks are. The role of unions are discussed extensively in the linked to article's comments. The idea that unions drive the cost of construction projects through demands for more labor appear to be quite tenuous. If you have evidence to the contrary cite them. Otherwise I would chalk up GP's comment as the typical anti-union scare propaganda. It's very common on HN.