I think all jobs should gain ~20% more base income, but only gain +1% income with each level. That way newer players will get money more easily, and veteran players will not be quite as OP with their income, helping to prevent inflation.
Current level 50 money gain is 200% base gain. This new one would be 120*1.5 = 180% current base gain (though it would show up as 150%), making it pretty close to what it is now while making everything slightly easier for new players.
Current level 50 money gain is 200% base gain. This new one would be 120*1.5 = 180% current base gain (though it would show up as 150%), making it pretty close to what it is now while making everything slightly easier for new players.