Many good answers here, but one also has to factor in that not all labour is socially necessary. With rising surplus value and extraction thereof, there follows also a rising inequality leading directly to more people becoming more or less servants of the capitalist class.
I would argue that labour of this type, whether that be managing contradictions arising from the capitalist mode of production or the placating of rich people's whims and needs, is not socially necessary. At the very least the product of this effort ranges from insignificant to detrimental for the proletariat.