In hospitals, for example, you are only taxed every time you use the facility. The amount taxed will be calculated by the amount of $ that you have and a fixed %age that is needed for hospitals to serve people.
In this scenario, no people are waisting their money on a facility that they do not use and incentivizes people to stay healthy because the service isn't as free, and makes it so that taxes are lower on products.
This system should also be in place for high schools, but I can't think of any other services right now that this would be good for.