That has to be true only for some countries in the world, but far from being the average. I don't think this applies to most of (western) Europe or Japan e.g.
Perhaps over the small window, but still lagging over the longer. So ultimately using the shorter window is data cherry-picking. Yes, the iPhone has a definitive start so the window makes sense, but keep in mind citizens / workers / taxpayers / consumers were plenty behind inflation at that point.
Anecdotally, I don't think I know anyone who believes they're ahead of inflation.
Housing is a component of the consumer price index used to measure inflation. The proportion matches the proportion of household spending that most USians spend on housing.
Of course, not every household is the average household. Some households spend more of their spending on things that have increased more than the average household. Some spend less of their spending on such things.
And, of course, even if the average wage has risen quicker than inflation, that doesn't mean any specific household's wages have.
I said "average" not "mean". The median is a form of average.
BLS looks at mostly median households in the survey dataset, but also considers means of some aggregates, when choosing weightings of goods in the basket.
I suspect in the specific case you're talking about -- housing -- using the mean would overweight housing in the basket.
