IMHO the incentive is already out there. Public Health.
It’s personal choice to get the vaccine, I respect that. Even more so if there is a valid medical reason not to.
It’s also a personal choice to accept all the benefits that have been made available, stimulus checks, PPE, unemployment plus ups, non eviction protection, tax benefits, etc, etc. if you personally chose to accept one of those then that choice should include getting the vax unless a valid medical exception. Maybe next year the IRS can have a validation question.
One thing that ticks me off is the media. Almost nightly our news will interview someone choosing not to get vaccinated. One of the latest: “Well, I’m over 40 years old, only gotten the flu twice my whole life. So I’m pretty healthy. I don’t see a need to get vaccinated” end of interview.
Never does the interviewer ask about protection of other people.
NOTE - And if ANYONE choses to make this into a political comment vs health safety I definitely will not respond.