Preventative care might not save money, but in a nationalized system which is funded by tax collection, having participants healthy so that they can live longer

Preventative care might not save money, but in a nationalized system which is funded by tax collection, having participants healthy so that they can live longer and pay more taxes sounds like a good idea. I feel like it's not only a moral argument, instead it's a better alignment of those who pay and are served by the system. At present, the goals of insurers and providers are very different from patients, partly due to profit-seeking, partly due to the disconnect in who pays for it (49% of US population receives employer-covered healthcare).