What a bunch of lazy, work shy gits! Originally people worked seven days a week, ain't it? Then came the revolution and, as you say, the week used to end on Saturday evening. Eventually, we arrived at the current situation - staff packing up on Friday and not returning till Monday (or, if still drunk, returning on Tuesday or Wednesday). Hail TGIF. Thank god we can get away from the job that pays the mortgage and puts food on the table. But that's not good enough for the TUC and they want the week to end on Thursday? Where do we go after Thursday? Wednesday, then Tuesday, then Monday? Why not just pay people for, like, breathing and such like? Why make them do work? Requiring work in exchange for money is the unreasonable expectation of oppressive capitalist fat cats and greedy bankers.