Any ‘aggregate’ number is at best an approximation. Inflation is a complex phenomenon, and even harder to pin down than some other aggregates like the unemployment rate.
However, so long as the criteria don’t change from quarter to quarter, the CPI makes for a good comparative number. We may not know exactly what the inflation rate is, but we can tell how much it’s changing for the same basket of goods. Whether it’s the correct basket is an endless debate.
All that said, I think 2% is a very low number, and inflation is likely higher than that. The real question, in my mind, is not how high inflation currently is, but whether it is transitory. If the inflation is simply due to supply chain issues and labor shortages brought on by Covid, then we can tolerate quite a lot, knowing that prices will come back down after the effects of Covid have been erased.
On the other hand, if inflation is high because of the mad money-printing going on in Canada and the U.S. then we are in big trouble. It’s very hard to unwind that without a lot of pain. And we can’t use interest rates as a weapon like we used to, because a decade of very low interest has created the mother of all global debt traps.
Thr mere mention of possible interest rate increases now causes markets to puke. A few dys ago Janet Yellen said that if inflation kept rising they might have to look at interest rate increases, but then had to come running out a while later to disown her own statements after the Nasdaq and the S&P 500 dropped.
If inflation is caused by money printing, then both the Biden and Trudeau administrations are in big trouble because they are planning to spend so much money that the only way to do so is to print it.
One way to tell will be to see how markets react if any of these giant spending bills get passed. Normally, the promise of free money boosts markets. But if the market decides that the new spending will just crowd out private spending and boost inflation, the reaction will not be so positive, I would think.
Also, do we count inflation that is imposed through taxes and tariffs? The Trudeau administration plans to annually raise carbon taxes on fossil fuels by the equivalent of $15/bbl of oil, which will raise input costs for almost every good made, shipped, and sold in Canada. All else being equal, we would see some inflation just fom that. And if Enbridge 5 is shut down, the East in the U.S. and Canada are going to see some large increases in energy prices this summer.