This problem isn't unique to the computer industry. As well as building and repairing computers, before I became disabled I had a mechanical contracting firm. I got so tired of listening to sales people who didn't know there product in the HVAC and Plumbing equipment line, that I refused to buy from those who didn't, even though the company supplier who's info I could trust, was more espensive. I have had the same problem when teaching with textbook sales people. Degreed engineers and MBA'swithout any practical background in the fields in which they work also cause a lot of problems. Administrative types need to learn that team work and knowlege of product is extremely important in both sales and production. It's hard to work as partof a team if you don't know and respect what your team members are doing.