The absorption systems are due to layering in the quasar and its surrounding nebulosity. No linear or monotonic relationship with redshift is expected. Quasar jets have variable polarization due to a magnetic field. The magnetic field is in invisible, young intervening galaxies, which must then have fields as strong as mature galaxies. The magnetic field is that of the local parent galaxy of the quasar.
Local galaxies have fields of about the measured strength.
These still defy any consensus explanation. Normal for stellar objects in a certain range of mass and temperature. A careful examination of the middle column reveals that almost all of these observational features of quasars have explanations in the standard model. The explanations do not flow naturally from the model until after the observations force a model amendment. By contrast, inspection of the last column reveals that most quasar properties become unremarkable if quasars are assumed to be nearby.