1. Big-ticket expenses such as rent, healthcare, and higher education - expenses that run into the thousands or tens of thousands of dollars annually - are severely underweighted or mis-reported. While rents are soared, the CPI uses an arcane (and misleading) measure of housing costs: owners' equivalent rent. Why not just measure actual rents paid and actual mortgages/property taxes/home insurance premiums paid?
Healthcare is 18% of GDP but only 8.5% of CPI. To those exposed to actual costs of healthcare, 8.5% of the CPI is a joke.
The same can be said of higher education: households paying tuition and other college costs are exposed to horrendously high rates of inflation, as illustrated in this chart:
Someone receiving Social Security is almost always receiving Medicare(discounted supplemental, and drug insurance). That means most of their healthcare costs, especially the high end stuff going up most in price is covered by the government. That is why Medicare cost to the taxpayers rises faster than inflation. Raising Social Security makes no sense based on the total healthcare share of the economy, but rather the average Social Security recipient share.
Most retired people have already paid off their mortgage. If they are buying a new house, it is to downsize. They are more likely to have a huge income from higher house prices than to have a huge loss. And they are allowed to keep that income once tax free. Even if they just rent, their rent is often stabilized.
As for education, I am not saying no retired people are going to college, but very few are. Even those that do go to college often get huge discounts.
I do agree the basket should be more tuned to retired people than the current basket which actually is for urban office workers. But I think that would actually decrease Social Security increases, not increase it. The major things rising faster than average inflation are overemphisized.