Just wanted to chime in here, after the comments of James Jackson, and Partisan.
I will concur 100% that what you are hearing is true. After many, many years as a Trade Overseer, I was moved to Architecture, and then to Purchasing and Estimating.
When onsite for the actual construction project, smaller, necessary on-the-spot purchases can be made by a "purchasing agent" that has a credit card and a truck, and can go down to the local store and pay full retail (short on bricks? short on siding? short on roofing?? short on paint?? who forgot nails? every single project...).... mostly because incompetant RBC members cant run a tape measure or read a set of plans.
The RBC purchases materials from Home Depot where it can. The pricing is a whopping 10% below full retail, as was mentioned. Holy Spirit is saving WT BILLIONS !!
Big deal. I can go to the local lumber yard and have them put together a package price that will beat HD every time. The pricing structure the RBC has in place does NOT benefit the local congregations. WT gets kickbacks and rebates, that go directly into their coffers. As stated previously, most prices are overinflated, and are far above retail. I also know several local "contractors" that are "vendors" to the RBC, that provide things like cabinets, podiums, artwork, decorations, etc to the RBC, and charge them a very PADDED pricetag. I saw the invoices that came through the office for these "brother" "vendors", and thought to myself ..... WTH??? Double dipping much??!! Seriously, $1200 for a podium/lecturn that could have been built in the garage on a Saturday night with a couple of beers??? Or $800 for an Information Board?
No way these guys could ever get away with charging this much on a commercial jobsite! Brother "vendor" just happens to also be a reg pioneer and a prominent elder in the circuit, so shut up and dont worry about it. Multiple times, many different brothers.
Or how about free reign to take a weekend with your wife and go on a buying spree to buy whatever fancies you to "decorate" a new KH, with artwork, vases, tables, pretty bathroom gizmoes, doilies, fainting couches and a rocker for the ladies, changing room wallpaper and art, mood lights for the babies.... have a ball! Here's a credit card! Gobs of money you would NEVER feel right spending on your own household, its suddenly OK for the KH, no matter the cost! Holy Spirit loves a cheerful giver buyer. !
And dont even think for a second about getting any other "bids" for materials or cabinets or carpet or windows or lecturns or info boards from anyone else! RBC comes down on you like a ton of bricks, for "not submitting to Theocratic Order". BULL...... SHIT. Guess why I got kicked out of purchasing...... Apparently Holy Spirit didnt approve of me trying to save the poorer congregations some cash.