No, that doesn't follow. If it were true what I am saying, then we would see less than one hundred percent match-up between growth in income and growth in consumption -- and we do.
That is incorrect. Savings are deferred consumption. People save to either consume later, in case they need to consume later, or for someone else to consume for them later.
We are obviously using the terms differently. Let me cut through this linguistic knot and simply say that there is an economic philosophy that does aim to maximize capital formation on the theory that what limits economic growth and expansion is the availability of such capital rather than consumer demand, and this is the economic philosophy that has more or less governed America for the past thirty years. Whether it should be called "supply side economics" is not really important.
I think its important to understand the concepts, whatever they are called. What you have been calling "supply side economics" or "capital maximization" or whatever does not preclude increases in demand. Supply siders (or whatever) argue not only do tax cuts increase capital formation but they also increase demand, for which there is empirical evidence. For example, income tax cuts affect demand, capital gains tax cuts affect capital formation. It isn't one or the other.
What they do argue is that increased demand through government spending does not help the economy, not that stimulating demand in itself is useless. According to the theory, demand by consumers is good, and supply side policies which increase demand are also good. We can argue about whether or not government spending is stimulative, but that's a different argument from what we are having.
Can you document this?
Yes. From the graph above.
New technologies represent a constant. In the 1950s and 1960s we saw the widespread introduction of plastics, television, power steering, stereo music recording, commercial jet planes, and many other inventions; in the 1980s and 1990s we saw the personal computer and the Internet. The earlier inventions did not correlate with widening inequality while the later ones did. Let me suggest that a non-consistent correlation argues against causation.
New technologies are not a constant because they affect different parts of the economy. Air conditioning and air travel have a very different effect on the economy than the disintermediation caused by the Internet.
The empirical evidence I refer to regarding the advent of technology on inequality can be found in this post.
http://www.usmessageboard.com/economy/192424-rising-income-inequality-not-3.html#post4371115
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