According to the Davis-Moore thesis, the main function of social stratification is what?

more important jobs mut offer enough rewards to draw talent from less important work

The Davis-Moore thesis was a thesis that was written by Kingsley Davis and Wilbert Moore that argued that social stratification represente the unequal value of different work. Certain tasks in society are more valuable than others which means that qualified people that fill those positions will be rewarded more than others. They defended that rewarding more important work encourages people to work harder and longer.