Not all modern work, just all the work that has directly or indirectly to do with money and jobs that come forth out of that (like the cleaning crew or receptionist of an insurance company or bank).
We do a lot of redundant, unnecessary work, just for the sake of working, without ever consciously asking ourselves what the use of this work is and who is actually helped with this. Unconsciously this question comes by a lot, and that makes people burn out in the long run.
Drop your assumptions and prejudice and read my posts again. We are actually able to make our lives easier and more comfortable, but instead we let ourselves be fooled and forced into doing robotic labor, never-ending jobs, and repetetive tasks. Just because we are told it's necessary and makes our lives more comfortable.