(continued from above...)
The next "myth" is that more inequality means more poverty. Tanner does not start off auspiciously, repeating the same fallacy-riddled talking point that I see many times on these boards:
There is little demonstrable relationship between inequality and poverty. Poverty rates have sometimes risen during periods of relatively stable levels of inequality and declined during times of rising inequality. The idea that gains by one person necessarily mean losses by another reflects a zero-sum view of the economy that is simply untethered to history or economics. The economy is not fixed in size, with the only question being one of distribution. Rather, the entire pie can grow, with more resources available to all.
That the economy can grow, or that, had we made different decisions, it might have been that we produced a little more wealth in some past interval of time than we did, is a red herring. The fact of the matter is that, in any given interval (say, in one calendar year), our economy, and any economy, produces a finite amount of wealth. That wealth is distributed among the population such that some receive more, and others less. Giving some more to one person does indeed mean taking it away from someone else, for the simple reason that wealth must first have been produced (past-tense, even if immediately past tense), and wealth produced in the past is finite. The fact that, in some alternate universe, we could have done something different and thereby perhaps produced more wealth than we actually did does nothing to affect conditions in the actual universe--nor does the fact that we can produce more next year have anything to do with how much we produced last year. Wealth possessed is wealth distributed (by whatever means--whether through earning, by freely entered contract, central planning, or anything else, but again, also past-tense, even if immediately so). That is, the wealth that someone possesses at this very moment was produced and distributed prior to them getting it, so by necessity, when we are talking about human wealth, we are talking about wealth produced in a finite period of time, which means, in turn, that we are talking about a finite amount of wealth. So, indeed, giving more to someone means someone else gets less. Now, by itself, that does not mean that the ones who get less are poor, though the fact that resources are scarce in conjunction with the fact that finite resources are produced in any given interval does imply that inequality has a good chance of increasing poverty.
Which brings me to another point about the way this "myth" is phrased: let's suppose I credit the findings of the studies the cato.org article cites--that is, suppose I agree with everything they say (see below--I have some things to say about this). Must I abandon the point I just made, above, if I am to remain reasonable? The answer is no. In fact, I can agree that greater inequality does not affect the number of people who are in poverty, and consistently believe that the giving someone more part of inequality directly implies that others will have less.
Suppose there are only two people in an economy, but wealth is very unevenly distributed among them. One person gets 90% of the wealth they both generate, the other person gets 10%. Now, we define poverty (in this hypothetical example) as having less than, say, $20,000 per year. The economy in question generates $150,000 per year, so the person who gets 10% gets $15,000 per year, the other $135,000 going to the wealthy person, so the poor guy really is poor by our definition. Now let's suppose we change up the percentages a little bit, and make it so that the rich guy gets $140,000 per year, while the poor guy now gets only $10,000 per year. The poor guy, perforce, gets less, since the rich guy gets more, and the economy always generates a finite amount of wealth. But did that greater inequality lead to greater rates of poverty? No, obviously not--it just meant that the poor guy was made even poorer. The lesson here is that measures like the bottom quintile of income or the federal poverty level or what-have-you still has a range to it; and if we give the rich more, it likely does mean that the poor get even less, but at the same time, poverty will not have increased in terms of the proportion of poor people in the economy. So the way the "myth" is stated is pretty weird and simply doesn't address the real issue...which I could say about all five of the supposed myths. Again, they are all rather slick straw men; there's no attempt made here to understand what the authors opponents are really saying before launching forward with counter-arguments.
(continued...)