I don't think it can be said that bridges are not present in the quasar situation. For example in this paper neutral hydrogen and x-rays show a bridge to several of the quasars. This is not the only example.Originally Posted by antoniseb
So the problem may not be a lack of bridges - but a lack of aquired data capable of determining the presence or absence of bridges.
On the other hand - given that Arp's scenario involves ejection of quasars along the minor axis - there is reason for expecting very little interaction of ejected QSO's with the disk of the galaxy in minor axis ejections and so the optical bridges that we see with the M-51 types should be much less frequently observed.