This presupposes that either a) inventions only happen in non-scarcity environments and b) that all inventors/support workers need be motivated by the common good, neither of which are necessarily true.

The question is further not about how someone can get rich, a workers pay movement can be motivated from either more individual pay, less class division, more equality, or even other reasons.

Society needs pavers, teachers, scientists to function, regardless if they do it out of charity or not. In the principle of being entitled to the fruits of your labors, these yield a huge return over a generation, making societal progress and welfare possible by preparing communal resources, teaching cultural and practical skills, or discovering things that could fundamentally change the reality society operates in.

In a Star Trek/The Culture post-scarcity egalitarian utopia where all needs are met, regardless if anarchist or not, this is definitionally not a problem.

But currently, teachers and scientists’ basic needs are not consistently met, and pavers regularly can’t sustain their profession until retirement.

So I find that the question remains: how would a system giving them a fairer share of the fruits of their labor work?