Do standard wealth measures overstate inequality in lifetime spending?
Core argument: The top 1% hold 13.7% of human wealth, a third of their 34.1% net wealth share, while the bottom 20% hold 4.9% of human wealth, eight times their net wealth share.
Current measures of wealth/income inequality overstate lifetime spending inequality due to more equal distribution of human wealth and progressive fiscal policies. The top 1% hold 13.7% of human wealth, a third of their net wealth share, while the bottom 20% possess 4.9% of human wealth, eight times their net wealth share. The average lifetime net tax rate for the top 1% of 40-year-olds is 34.5%, compared to -46.6% for the lowest quintile. Without fiscal policies, the richest 1% would account for 17.9% of remaining lifetime spending (RLS), below their 34.1% net wealth share. The poorest 20%, with 0.6% net wealth, have a 4% pre-fiscal resource share. Thus, human wealth distribution and fiscal policy equally enhance the RLS share of the poorest quintile, highlighting that wealth measures overstate consumption inequality.



Note Paper and initial writeup are attached.
Ed Comment:Please send me this. (you sent me the paper)…. PS. I don’t understand this line, in particular, the word “its”. Surely, the top 1% will spend a lot more than 2x the bottom 20% (ie 14.5/7.3) “Among 40-year-olds, the richest 1% own 34.1% of their cohort’s net wealth, but account for only 14.5% of its remaining lifetime spending. The poorest 20% own only 0.6% of the cohort’s wealth, but are expected to do 7.3% of its spending.”
, Kotlikoff and Auerbach push back at Saez/Zucman:"...Economists Emmanuel Saez and Gabriel Zucman……wrong, and three huge mistakes underlie their analysis. The biggest mistake is to focus on gross, not net, taxes. They ignore transfer payments, like Social Security, which are disproportionately paid to the poor...Messrs. Saez and Zucman’ssecond mistake is measuring progressivity on a one-year rather than a remaining-lifetime basis. That ignores the fiscal system’s double taxation: Income earned, taxed and saved this year will be subject to future taxation on interest, dividends and capital gains. This omission disproportionately understates taxes for the rich, who save at a higher rate. The current-year focus also understates benefits paid to the poor, since future benefits are a bigger share of their resources. Theirthird mistake is failing to adjust for age.The old have paid most of their lifetime taxes, which makes them now look like tax cheats, particularly those who saved out of previously highly taxed labor income. With changing demographics, this problem will deeply confuse tax progressivity comparisons over time... the net tax rate facing middle age Americans rises rapidly with their resources—from negative 46.4% for the bottom 20% to positive 34.5% for the top 1%...."