I think The Economist said it best:
http://www.economist.com/blogs/freeexchange/2013/04/exchange-rates. As of now the Bitcoin economy is functioning like a micronation where all goods are imported and all jobs are offshored. Bitcoin merchants pay their suppliers in fiat (i.e., they "import") and pay their employees in fiat (i.e., their labor costs are "offshored"). No internal supply chain has developed.
In order to get the supply chain developed, I think the best approach is to promote BTC with B2C merchants and work backward and forward from there. As more merchants accept BTC, the incentive for their suppliers to offer their goods and services denominated in BTC will grow, as there are clear advantages for them to do so. So the economy grows from the B2C point back to suppliers. Also, more B2C points for consumers to directly spend BTC means less resistance from employees to accept paychecks denominated in BTC, so the economy grows from the B2C point forward to consumers.