Tax isn’t “wasted” by making money vanish from the economy though (except for the deadweight loss) it’s just redistributed to other people via payouts, jobs, loans or indirectly via goods purchases. Statistically, some of these beneficiaries will enjoy longer lives through the same indirect income-mortality relationship you invoke to associate taxes with death. This is true even of public spending which is—relative to others—extremely wasteful and not evaluated as lifesaving even by its proponents.[1]
Which is why I’d argue it makes far more sense to focus cost-benefit analysis on deadweight losses and [counterfactual alternative] uses of public funds. Because regardless of whether the tax is focused on creating “good things” or not, the net result of the transfer probably isn’t killing people..
In a developed country with a progressive tax system, the demographics paying most of the tax are unlikely to typically need the income to survive more than state employees or other [indirect] recipients the resulting public expenditure benefits, even for ridiculous ideas like paying millions of dancers to create synchronised tributes to the president. So ignoring extremely indirect and difficult to quantify transfer effects (or explicitly treating them as netting out to zero) in favour of focusing on direct effects and deadweight loss in cost-benefit analysis probably if anything is biased against tax and spend. Empirically, tax burden is positively correlated with longevity, even amongst US states.
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paying superfluous bureaucrats may be an inefficient way of saving lives, but in exactly the same way as taxing people is a very inefficient way of killing, especially where the tax is progressive above affordability thresholds and targeted benefits/rebates exist
Even if one takes the midpoint of the RP intervals as established fact, there are a lot of other assumptions Vasco’s arguments depend on, like the magnitude and duration of suffering a particular creature experiences with pain scales with thousands of points to cancel out the RP weights, and the cost-effectiveness of brand new charities in a field (campaigning) where marginal cost-effectiveness is relatively difficult to measure.
Unlike for RP we don’t have published estimates of distributions or confidence intervals for these, but if we did they’d also be extremely wide and I’m not sure that animal welfare interventions would look better across most of the distribution for them.