However, I believe a part of that contribution has to be in an objective, quantifiable way - which translates to taxes. The rights we consume from society are tangible and expensive. A city populated only by of poets would collapse of starvation after 12 hours…
That said, if a Society feels they need to foster a specific part of it (culture,social work, etc) they can enact tax breaks to reduce the financial load of those making that contribution.
But taxation comes first (as an obligation).