There is a valid point underneath all the vitriol.
From among my circle of friends (we are all very open about money), I know that someone working part-time with top-up benefits, HB etc, is only £100 pcm a worse off than someone working full-time with on nothing other than CB and basic child element of TCs. That's not really fair, but IMO the fault lies with work not paying enough, not the tax credit system being too generous. Both struggle.
But that's not quite how the OP was presented...