No, I'm not.  Most stock houses  base decisions on content and quality of the imagery, correct metadata,  and proper releases. Cost of production has no bearing on the decision process. If you can get amazing photos, that fit within submission requirements,  out of a point-and-shoot with very little production cost you will probably be very rich. For the most part however stock photo shoots  cost money (Photographers, Models, Locations, Lighting, Food, Travel, Stylists, ect).
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That's a fairly typical '1st world' response. 

For y'all buyers wanting to pay way less, have a look around on some of the micros and find yourselves some excellent images by 'locals' who know their stuff and don't rely on the huge budgets to produce legitimate stock