1. it is well established that human pyschology makes relative income and wealth much more significant than absolute. And it doesn't matter which quintile you're in for that to be true.
2. real median household income stayed relatively flat between 1970 and 2012. Since then it has risen again in a significant way.
3. despite the gains in real median household income, the rise in the household income (and net worth) of various upper percentiles (20%, 10%, 5%, 1%, 0.1% ... take your pick) has been very, very much larger. consequently, the "double my income, double Musk's income" line is not a description of what has happened.
4. the percentage of GDP that accrues to capital rather than to labor have gone steadily up since 1980.
2. real median household income stayed relatively flat between 1970 and 2012. Since then it has risen again in a significant way.
3. despite the gains in real median household income, the rise in the household income (and net worth) of various upper percentiles (20%, 10%, 5%, 1%, 0.1% ... take your pick) has been very, very much larger. consequently, the "double my income, double Musk's income" line is not a description of what has happened.
4. the percentage of GDP that accrues to capital rather than to labor have gone steadily up since 1980.