The paper deals with optimal taxation and the provision of public good
s in a two-class economy with non-linear income and linear commodity t
axes. As far as optimal taxation is concerned, we first show that with
two private goods the good complementary with leisure should be taxed
more heavily. Secondly, the standard income tax rules are shown to be
augmented by considerations for offsetting the distortions created on
the commodity markets. As to the provision of public goods we extend
recent results for a two-class economy with public funds raised entire
ly by means of a non-linear income tax system. The standard Samuelson
rule is modified by two additional terms related to the self-selection
constraint and to the revenue of indirect taxes. They are both shown
to vanish when the agents' utility functions are weakly separable betw
een public and private goods (taken together) and leisure.