The Rhodesians maintained the system was broadly fair since the 50/15 power share split reflected the relative contributions of white and black communities to the "fisc" (that is, the tax take). Progress to black majority rule was possible within the arrangement of the 1961 constitution as a result of advances in black wealth and education, although it would have taken some years to achieve. It would have required the black community to patiently accept an extended period of white minority rule followed by an extended period of power sharing.