Not only do I agree with what you are saying; but, I will not use Angie's List for referrals again. Their "A" rated painter did some of the exact things they are now warning against; however, they are still rated "A". I sent in a review and it took eight weeks to post it. They allowed the contractor to lie about what happened as a response. I had proof and photos. Angie's List is a scam; instead ask neighbors and friends for referrals!
According to the Bureau of Labor Statistics, 45 percent of all painters are self-employed, though that number may be slightly higher if companies hire freelancers or self-employed painters as part of their team. The price that painters charge for their services is largely dependent on their association and whether the job is completed in the warmer or colder months (painters often charge more in the summer and less in the winter, given demand and other factors). More information regarding painter rates and associated factors is included below.
This article with comments was terrific - it was so informative. I found the advice useful. It addressed specifics like the condition of the dry wall surfaces, any additional repairs such. pin holes, chalking, smoothing of wall surfaces, absorption of paint and number of coats that may be needed. It should also include insurance coverage, and reflect the clean-up afterwards. Having a written contract with the company's letterhead is a must.
Sand the trim with a fine-grit sanding sponge. Sponges get into crevices where sandpaper can’t go and let you apply even pressure. Then apply the first coat of paint, let it dry at least 24 hours, lightly sand it again for a completely smooth surface, and apply the second coat. After each sanding, vacuum the trim, then wipe it down with a tack cloth to remove the dust.
Third: The contractor buys the materials. We get them at a better rate and customers really don't know what they are getting into by being a material racer. Once again, I'm not referring to the guys that paint a bedroom or 2 a week. Tell the homeowner to go grab 50 gallons of paint, $300.00 worth of sundries and related job cost items and I'd be interested to see how it works for them....IT WILL NOT. And if were talking about people getting taken advantage of here, the paint suppliers with no relationship to a homeowner will 100% GOUGE the customer and completely take advantage of them with pricing. Contractors will pay nearly half the price and will still save the customers money marking up paint 10-15%.
The PREP Study is attempting to reduce isocyanate, dust and solvent exposures for autobody shop workers in Connecticut. We have produced a user-friendly DVD-based training program with a great deal of input from the autobody community. The DVD contains information for painters, autobody technicians and anyone else working around a body shop, including:
IF the average cost is $1700 to paint an interior, then that means the cost of paint is approx. $200 (12% of the job).  Or better said 5 gallons of paint (if the average cost is $40 retail).  The average room takes 1.5 gallons which will cover 3 average rooms.  Doesn't sound to average to anyone with knowledge of this industry or a average house.  You are misleading consumers and should do a better job in your research.  No wonder so pay people think prices to get work done by professionals is high.  Its not high, its actually average which is more like $3700.

House Painter Co