Quote from Martinghoul:
OKI, I agree with you that, ideally, we'd like consistency.
However, if we take this consistency to the limit, eventually your basket gets woefully outdated. Let's take an extreme example. One of the earliest inflation-linked bonds, the Massachussetts Depreciation Note issued to Revolutionary soldiers in 1780 in lieu of wages, was linked to the following:
Five Bushels of Corn, Sixty-Eight Pounds and four-seventh Parts of a Pound of Beef, Ten Pounds of Sheeps Wool, and Sixteen Pounds of Sole Leather
Personally, I don't think I'd want any of my contracts today linked to that, 'cause I don't consume any of those things.
My point is that consistency eventually leads you into a dead end, where you potentially have to change the entire basket all in one go. Given that this is undesirable, the gradual substitution that's practiced, not just by the BLS, but worldwide, is actually a better alternative, IMHO. You can say the same about the hedonic adjustments, but things get a bit murkier there.
Yes you have taken this line of thinking to the limit and yes things must change, preferably gradually in order to reflect the current situation. I agree with you.
Companies come and go from DOW and S&P in the same manner.
That is the consistency of change and growth.
However, we must never lose sight of the fact that more and more people are being indexed to the CPI and so the gov. bias is naturally wavering on the low side.
Very crudely speaking when money supply expands to keep pace with an expanding economy, measured in real terms, then we have balance.
If the supply outstrips growth measured in real terms we have the sort of imbalance that has been in play for decades.
Eventually the piper must be paid and what I suspect is that the pain is being shared between the current living population and the yet to be borne.
Placing morality to one side for the moment, this is a very fine line that must be maintained for years as the population raises it's act and therefore it's income. But debt comes before income and inflation may not be able to wash away the sins of the past, because new sins are being created too rapidly ... that is the current debate.
In a population as diverse as US these changing conditions will only gather up only so many people, maybe 30/40% of the overall population, leaving the balance as a majority underclass in a so called democracy.
Robots and AI will perform many of the lower class jobs instead.
Quit frankly, it does not warm your heart to even contemplate this and it is more than possible that the country will eventually fractionate as a result.