Re: Strands in the Tapestry: the Business, Economics, and Tax Policy Thread
One of the most difficult parts of any conversation about taxes is that there is more than one theory of taxation, and people rarely describe their theory clearly, instead plunging directly into debates about minutia.
Also, we tend to segregate taxes into different categories, and then treat each category in isolation, sometimes ignoring how they might intersect. We have payroll taxes (one for Social Security, a different one for Medicare). We have income taxes, we have a wealth tax (capital gains tax) that is reported as income even though technically it is not (you are paying tax on a change in asset value if you sell but not if you don't sell), we have a wealth tax that is only assessed at death (estate tax and Generation-Skipping Transfer tax); we have a gift tax that is a hybrid of an income tax and a wealth tax (while generally viewed as part of the "transfer tax" system today; the gift tax was implemented when there was a severe gradation in income tax rates; parents in a high tax bracket would transfer money to children so that the interest earned would be in a lower tax bracket as a result), we have a dividends tax. We now have a "payroll tax" (Medicare tax) on investment income thanks to that farce called PPACA.
We also have all those federal taxes buried in the fine print of our telephone bills, wireless bills, and cable bills. We have taxes on some imports.
We have state sales taxes, state income taxes, state "use" taxes, and state wealth taxes (property tax, personal property tax, state estate tax). If you are fortunate enough to live in New York City, you even have a municipal income tax!
No wonder any kind of rationality is hard to find!
Some examples of various principles that contribute to the formation of a theory of taxation:
> taxation should be used to incentivize behavior (e.g., "sin" taxes to reduce tobacco and alcohol use)
> taxation should be used to promote broader social goals
> all income should be taxed only once
> people who have more should pay proportionately higher rates on an "excess" amount than people who don't ("progressive" tax system or "graduated rate structure")
> taxes should be economically neutral (which might easily conflict with the first two points!)
> taxes should primarily be used to raise revenue, economic side effects are secondary
> other people should pay more than me

> to name a few, I'm sure there are more.
If you then take some of these principles and use them to develop a theory of how taxes "should" operate, then you might well find that following one theory results in conflict when compared to another theory. There is no way to reconcile that conflict by debating the details; both sides need to take a step back to look at WHY they are advocating for (or against) a particular tax if agreement / compromise is to be reached.