\indexentry{progressive   tax|hyperpage}{163}
\indexentry{graduated tax|hyperpage}{163}
\indexentry{tax bracket|hyperpage}{163}
\indexentry{piecewise linear|hyperpage}{164}
\indexentry{effective tax rate|hyperpage}{165}
\indexentry{FICA|hyperindexformat{\ see {Social Security}}}{165}
\indexentry{Social Security|hyperpage}{165}
\indexentry{Medicare|hyperpage}{165}
\indexentry{regressive tax|hyperpage}{166}
\indexentry{regressive tax|hyperpage}{166}