I've got a couple of friends and one of my family members who have had second children to keep their benefits and they don't have any intention of even looking for work, now I don't agree with it, but I wouldn't go as far as to say it's disgusting. I've found myself having to bite my tongue at times to keep quiet, but the way I see it their children are loved and well looked after, it's just a shame that they'd prefer not to work to support their child as I dread to think of what sort of example it will be setting.
From my own personal experience, I was ttc and both my partner and I were on benefits. I was (and still am) claiming carer's allowance for helping to look after my disabled mother, and Chris was on job seekers. We'd made a move to Wales after my dad had died so that I could be closer to family. As it is, Chris now has a well paid job, but at the time I didn't see any problem with ttc as we knew we wouldn't be in that situation forever as Chris was determined to get a job