I'm not saying it's true, but in all of those cases it intuitively seems like a bad idea to encourage/not discourage those behaviors. Giving people handouts might give them an incentive not to work, giving corporations handouts lessens the incentive to not fail (and keeps the competitors which did better from gaining a larger market share), refusing drug addicts welfare might encourage them to get help, etc.

I'm not saying these things are necessarily true, but it certainly seems reasonable if you don't know otherwise. The point being that it's not because people necessarily see these things as moral issues, but just possible incentive problems.