I agree. The article puts "extrinsic factors (like the chance to earn a big bonus) or intrinsic factors (like personal fulfillment)" as the primary factors. Th

I agree. The article puts "extrinsic factors (like the chance to earn a big bonus) or intrinsic factors (like personal fulfillment)" as the primary factors. The "third" motivation, and I'd say likely the most common, is "fear". Even if the fear is that your children will suffer the same servitude that you are experiencing.