Several years ago my daughter gave me a Diamondback that she had bought for about $500. Built my first MB on that platform, a friction drive and promptly started breaking rear spokes. After that, all bike wheels are replaced with 12 ga. wheels and I haven't had problems since except with my Staton rear wheel that's 14ga. It's a 48 spoke Sun Rhyno Lite double wall rim and it still occasionally breaks spokes. I've been riding with as many as three broken spokes and never even felt it.
My chain drive bike uses a freewheel threaded on the hub, you "Chinese kit" guys, with the rag joint are asking for disaster with 14 ga spokes, on any bike.