Don't mean to sound trite or lapse into unrepentant corny-ness, but
Rather than moan about 'why isn't someone doing something' - we need to act...
1. Don't Lift - period. Use mechanical lifting devices. All US organizations have to have them, since this is mandated by OSHA.
2. Begin reporting all "near misses" - you're not doing anyone a favor by covering everything up so they won't get into trouble. This is the only way that the true magnitude of problems can come to light.
3. Stop Blame-shaming. We're all human, therefore we make mistakes. Be supportive to colleagues rather than participating in malicious gossip. I know that this may seem contradictory to #2, but it's not. We should acknowledge honest mistakes, but recognize them as such.. not intentional lapses.
4. Refuse to cut corners. Wash your hands each time. Apply conscious deliberation to complex tasks such as medication administration. This does take longer and may mess up your 'time management', but it is what it is. Safety is more important.
5. Intervene when you witness problems. Don't just stand there and watch. Yes, it IS your business because it affects safety and quality...
If each of us draws that line in the sand and stops making compromises when it comes to safety, it will make a difference.