When do individuals act in a (genuinely) motivated manner, and when under constraints?

In a talk from the 14th July 2017, Morus Markard raised the following question: In view of the complexity and contradictoriness of social conditions and their interpretations – are individuals able to determine their own decisions and actions and to be reasonably certain that these are in line with their own life interests, or at least do not contradict them? This question emerges from the problem of motivated acting within an antagonistic class society: The actual producers are virtually excluded from participation in the planning of production and reality control but still have to adopt to societal requirements and goals as well as to obey societal obligations. The individual may not strive for their own goals but, instead, internalize those of societal authorities. So, what does Marxist Subject Science or Critical Psychology contribute to the understanding of humane motivation? Under which circumstances do individuals tend to engage in motivated acting (in terms of critical-psychological conception) within an antagonistic class society; that is, to stand up for an augmentation of control over their own living conditions or to gain a generalized human agency (German: ‘verallgemeinerte Handlungsfähigkeit’)?