Another example are tax breaks related to children who have not yet attained a specified age. That age varies depending on the provision, but regardless of the inconsistency, a reference to age is necessary because in a general sense, all taxpayers are children, and remain children for all of their lives. Ask any parent.
Yet there are age-related provisions that make little sense. For example, the standard deduction increases when a taxpayer attains the age of 65, presumably because of some notion that people who reach the age of 65 are somehow in need of reduced tax liability. But does it make sense to base a reduced tax liability on need for tax relief and yet ignore income? No, because the assumption that people who have attained the age of 65 need tax relief totally disregards the fact that income, whether gross, adjusted gross, or taxable, is a far better indicator of ability-to-pay than is age standing alone.
And that brings me to a proposal that reader Morris brought to my attention. According to this Northwestern University press release, two economics professors, one at Northwestern and one at the University of Kent, have proposed that because workers become more productive over their working life, they should pay a higher rate of tax as they become older. Specifically, they claim that workers between the ages of 45 and 65 should pay at a rate 5 percent higher than the rate paid by workers between the ages of 20 and 44. Whether they mean 5 percentage points, for example, a 15 percent instead of a 10 percent rate, or 5 percent, for example, a 10.5 percent rate instead of a 10 percent rate, is unclear.
The two researchers claim that their proposal “could bring welfare gains to each taxpayer equivalent to those brought in by a 4% increase in annual consumption throughout their entire work life” and that these “gains are significant to warrant the consideration of policymakers and shape the debate on how to best reform existing tax codes in the U.S. and other developed economies.” They explain, “This is because age-dependent taxes permit the government to generate tax revenues more efficiently by reducing the distortions in labor supply of those workers, the young, whose investments in human capital count the most. Furthermore, by incentivizing the young to work more to boost their productivity, the government can take advantage of a more productive population when the young turn old, collecting taxes from them in a less distortionary manner, which also brings non-negligible welfare gains.”
Reader Morris asked me for my reaction. I pointed out several aspects of reality ignored by the researchers. First, the premise that workers are more productive as they get older holds only if they are in the same job or career. Present-day reality is that workers hop not only from employer to employer within the same field, but also change from occupation to occupation. It is possible for a 37-year-old working at the same job for 15 years to be far more productive than a 47-year-old who entered that job 6 years earlier after working for 20 years in some other occupation. Second, as workers become more efficient, they might receive wage increases or, if functioning as sole proprietors or partners, experience increased net profit increases. Or, as is happening to many workers, their wages might stagnate despite productivity increases. In the former situation, as wages or net profits increase, their tax liabilities will increase, and in some instances, they will be propelled into higher tax brackets. In the latter situation, absent tax law changes, their tax liabilities also will stagnate, and it would be absurd to jack up a worker’s tax rate when the worker attains the age of 45 even though their income is unchanged. Third, changing tax rates based on age is an unwarranted discrimination. Why should a 30-year-old making $600,000 a year pay less income tax than a 57-year-old making $600,000 a year (assuming other factors are the same)? Fourth, plenty of people between the ages of 20 and 44 are raking in substantial incomes while there are people between the ages of 45 and 65 are barely making ends meet. A tax system that favors high-income younger workers to the detriment of low-income older workers makes no sense. Put another way, ability-to-pay, a key concept underlying progressive income tax rates, has nothing to do with age and everything to do with income.