Could you go into more detail here? Corrupt in what way? I haven't really heard this claim before, and the general idea that you shouldn't be taxed on non-discr

Could you go into more detail here? Corrupt in what way? I haven't really heard this claim before, and the general idea that you shouldn't be taxed on non-discretionary income (e.g. buying milk, clothing, and paying taxes that make your schools and roads work) seems sound on the face of it.