This is interesting and, yes, I do understand. Yet, another take on this is that groups (parties) would then rob themselves from perhaps working with or searching for the most capable of providers.

I am not trying to diminish anyone at all, but I would think these kinds of party line attachments mean that not everyone ends-up with the most capable developers, particularly so if what drives this is passion rather than a skilled software shop that with proven capabilities and experience across a range of relevant domains with an equally proven track record of delivering quality, well tested bug-free product.

Of course, the parties would have to we willing to pay more than hobby money for what they need.