Originally posted by carpedm9587
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As far as I'm aware there aren't really good analyses out there about what the 'right' amount of taxation is. However a couple of back-of-the-envelope analyses I've done over the years:
This is a plot of happiness of OECD countries on the vertical axis (as reported by the UN World Happiness Report, higher is happier) plotted against the percent of the country's GDP that the government takes in taxes on the horizontal axis (according to the OECD database). (Apologies if TWeb's graphics upload feature doesn't make it very clear to read, bigger version here)
happiness plot3.jpg
The automatically generated trendline indicates that increasing happiness on average correlates with higher taxation. Also, the country at the top right of the graph, is Denmark, which has the highest taxes and is also the happiest country.
Another way of looking at it is to compare the US states with each other. WalletHub.com provides rankings of the 51 US states (50+DC) based on the amount of taxation that a median household in those states pays, and it ranks the states 1 (lowest taxed) to 51 (highest taxed). It also provides happiness data, ranking the states from 1 (happiest) to 50 (least happy), with DC not included in that list.
Here is that data graphed (larger version):
Happiness v Taxes for US States.gif
The automatically generated trendline indicates that higher taxed states (to the right) are on average happier (closer to the bottom of the graph) than are the lower taxed states (to the left end).
So two totally different data-sets (US States, OECD countries) both demonstrate correlations between higher taxes and higher happiness. Denmark, at highest happiness, has taxes such that the government revenue from also sources (income tax, company tax, sales tax, tariffs etc) is about 50% of GDP. So generalizing wildly from our data, I would say that higher taxes generally seem to be 'better' (in the sense that the people who live in those regions are happier), and the optimal amount for taxation looks like it could be about 50% of GDP, which strikes me as a aesthetically pleasing number (in the economy the government spending half and the private industry is spending half, it's an equal public-private partnership, midway between the libertarian "no government, the free market is all" and the communism "the state runs everything"). Although, to be clear, the data is consistent with even higher taxes than Denmark's being optimal (e.g. 70% could be the happiness-optimal tax rate), we simply don't have good data at those taxation levels because no modern Western country operates in that region of taxation.
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