Well, actually, these two statements:
-----"I don't read Murphy (or Penn Mutual) as applying that broadly. Under current case law, a tax on property BY REASON OF ITS OWNERSHIP (whether realty or personalty) would probably still be considered a direct tax, not an excise.
and:
-----"[T]hat under the Constitution there is no requirement that something actually "be" income in order for Congress to validly CALL it income and TAX it as though it were income. The courts are right."
--actually do stand in tension to a degree. So, you are essentially correct when you say I am "taking it back" -- at least in part -- when I say that I don't take Murphy and Penn Mutual as applying so broadly that a property tax could be imposed without apportionment simply by calling it an income tax. I am acknowledging that if taken to an EXTREME, the power to tax ANYTHING as "income" might be interpreted as a power to tax property itself by simply calling the tax something else -- and I am saying that I doubt that the courts would interpret the Constitution to that EXTREME.
Now, let's look at your statement: "I fail to see where you [Famspear] have given any indication of what can or can not be taxed as income. It's kind of impossible to argue a point when you've given such a vague understanding of what income is."
Aw, come on now. We have just spent page after page in this (or other) threads discussing what is or is not true economic income, what is or is not Sixteenth Amendment income, what is or is not section 61 income, and so on.
Yes, there is often some vagueness at play, but I do not believe you are having any serious problem with "vagueness." You ARE having a problem accepting the truth: that the law is what the courts rule the law is, and not what you want the law to be, based on your own method of reasoning.
If you are this uncomfortable with uncertainty, complexity, and vagueness, then the study of law may be the wrong place for you to be. The ESSENTIALS of the U.S. Federal income tax law are not, however, so vague, so complex, or so uncertain as to be "unconstitutional" or "not understandable" by a person of normal intellect. Again, to quote Justice Blackmun's dissent in the Cheek case (talking about wages being income, and being taxable):
-----"It seems to me that we are concerned in this case not with "the complexity of the tax laws," ante, at 200, but with the income tax law in its most elementary and basic aspect: Is a wage earner a taxpayer and are wages income? [ . . . ] t is incomprehensible to me how, in this day, more than 70 years after the institution of our present federal income tax system with the passage of the Revenue Act of 1913, 38 Stat. 166, any taxpayer of competent mentality can assert as his defense to charges of statutory willfulness the proposition that the wage he receives for his labor is not income, irrespective of a cult that says otherwise and advises the gullible to resist income tax collections. One might note in passing that this particular taxpayer, after all, was a licensed pilot for one of our major commercial airlines; he presumably was a person of at least minimum intellectual competence.
--Famspear
"My greatest fear is that the audience will beat me to the punch line." -- David Mamet