Loyalty is faithfulness or a fixation (psychology)" to a "Person", group, or cause. (Philosophers disagree as to what things one can be loyal to. Some, argue that one can be loyal to a broad range of things, while others argue that it is only possible for loyalty to be to another person and that it is strictly interpersonal.)
An incentive is something that motivates an individual to perform an action. The study of incentive structures is central to the study of all economic activities (both in terms of individual decision-making and in terms of co-operation and competition within a larger institutional structure). Economic analysis, then, of the differences between societies (and between different organizations within a society) largely amounts to characterizing the differences in incentive structures faced by individuals involved in these collective efforts. Ultimately, incentives aim to provide value for money and contribute to organizational success.