Well, I disagree Ron. Simply put, engineers aren't the only ones capable of developing good ideas. I don't believe a person needs 35 years of experience in engineering before their ideas can be considered feasible, if only a bit conceptual at inception.
What Open Source does is provides a larger pool from which to draw ideas, and collaboration. As an engineer, you have a wonderful opportunity to get involved with that collaboration in a constructive way, ie lending expertise to help good ideas grow.
As a consultant engineer, and really to the OP, you can easily get involved with Open Source projects. This will help facilitate collaboration with skilled and knowledgeable professionals, and done "correctly" it can actually help PROMOTE the profession. It can PROMOTE the prestige the profession deserves.
I used WikiHouse as an example, there are many others. I'm aware of the code issues, etc. but the point is bigger than that... we have an opportunity to engage ourselves a bit more directly with the community. We have nothing to lose by getting involved, gaining exposure, and providing a valuable resource such that ideas can grow / develop safely, efficiently, etc.
As far as reducing the pay... I don't think Open Source has anything to do with that. I would assert it has something to do with the supply of young engineers entering the depressed workforce which has been decimated by outsourcing and financial speculators, along with companies trying to protect their margins by paying less for more output. The money isn't there anymore, universally, so people are looking to do whatever they can. This can also explain the surge of DIY and Open Source resources which seem to have popped up in recent years. That's a completely different topic. So rather than loathe, chastise, or begrudge the young talent, this could be a great opportunity to mentor and encourage that talent... you know, to protect the prestige the practice deserves.
Experience: accumulated knowledge over time.
Talent: the ability to use experience.
Which is more valuable?