Here's a good idea:
The Guardian: NHS Chief to Introduce Sugar Tax in Hospitals to Tackle UK Obesity CrisisHospitals across England will start charging more for high-sugar drinks and snacks sold in their cafes and vending machines in an effort to discourage staff, patients and visitors from buying them, the NHS England chief executive said.
Here's what would be even better: don't sell junk food at all in hospitals. That would send an even stronger signal. My guess is it's going to happen, sooner or later.