If certain sectors fail because they don't receive enough funding clearly those sectors are unessesary. You mean the organisations that bomb kids in syria that would crumble because nobody actually wants to pay for them? You want to give away your own earned money unessesary government departments and sovjet erea public swimming pools, schools and hospitals that are crumbling because there is no funding for them despite the 50% income tax people have?
Roads, sidewalks, parks etc can all be funded through consumption taxes so no man is forced to give away 36-50% of his value of labor so the government can bomb kids and throw people in jail for years for smoking a plant.