This represents nothing more than an attempt at a moral justification of the way value is produced in capitalist societies. It's a justification of exploitation, and not a coherent, well grounded explanation of how value is produced.
As such, it should be complemented by another question - does the working class deserve to be "rewarded" by griding, mind numbing toil, by the ever present threat of redundancy and wage cuts, by a lack of control over their labour and the decisions which affect their lives (decisions with regard to the operations of the company, and political decisions), by increasing precarious labour they are forced to perform, by the flexible labour time going along with it that eats up a human being's life affecting their relationships and activities outside the sphere of work - do we all deserve to be "rewarded" like this just because we are not in a position to take the risk, and we cannot be since risk takers need people who cannot do so?
FKA LinksRadikal
“The possibility of securing for every member of society, by means of socialized production, an existence not only fully sufficient materially, and becoming day by day more full, but an existence guaranteeing to all the free development and exercise of their physical and mental faculties – this possibility is now for the first time here, but it is here.” Friedrich Engels
"The proletariat is its struggle; and its struggles have to this day not led it beyond class society, but deeper into it." Friends of the Classless Society
"Your life is survived by your deeds" - Steve von Till