In my view such an interpretation would not be warranted. But let me explain my position, then you can make a judgement. And thus there is atheory of endogenous technical change and growth in Marx. This is not the case with Marx. He simply does not leave much for the capitalists to make a decision about.
Luxury enters into capital's expenses of reproduction.
The question of agants and agants' action is the question of the subject and its subjectivity. The economies function on the notion of exchange with nature. The subject of Medieval Europe was the subject of God. The church played a large role in in constituting this subjectivity that sustained and reproduced the feudal relations. I think I should stop here.