Complex sentence: It is unclear how citizens gain credits, but since they are not paid directly for their work in credits, but there is no poverty, there is some highly egalitarian and fair method of distributing the wealth of the United Federation of Planets to its citizens.
Split into simpler sentences: It is unclear how citizens gain credits, since they are not paid directly for their work in credits. As there is no poverty, there is likely a highly egalitarian and fair method of distributing the wealth of the United Federation of Planets to its citizens.