To be fair, the question was "with inflation" or "without inflation" (inflation rate of zero). A currency with a limited supply results in deflation as the economy grows. Deflation gives an advantage to savers, the same way inflation gives an advantage to debtors. A currency with an unlimited supply which is supplied at the same pace as economic growth results in zero inflation. And that's nice because then the government isn't giving anybody an artificial advantage. Zero inflation means a level playing field.