But I'm not sure not having to worry about work would be good for everybody — me included. It could be good ... but I worry it could also leave one purposeless and adrift (I have some anecdotal evidence on this point).
Apologies for not looking up the literature to corroborate this (or not), but I should get back to the day job.
These numbers are low by a factor of ~2 unless you want to live in flyover country/a cheap country other than America.
If that's not enough to not worry about work, you might have lifestyle issues.
$1MM won't buy you a "really nice house" here, though, so I agree with you on that point, but it is still enough to not worry about housing if you choose "sufficient, not luxurious" level of housing.
$1MM will buy you a very nice new construction 6,000+ sq ft house on about 20 or more acres of land with an outdoor pool most likely. And you're within commuting distance of major job markets. $10MM and you're living quite comfortably (probably spending weekends at your cabin on the lake) and certainly not needing to work, so maybe you spend your free time tending to your horses or alpacas.
To just not have to worry about housing, even if I were to buy a house again today, would only take about $600k for a pretty standard 3 bedroom house w/garden even in London...
Edit: they're the famous HNWI ("High Net Worth Individuals")
https://en.wikipedia.org/wiki/Millionaire
https://en.wikipedia.org/wiki/High-net-worth_individual
The famous "one percenters" are people with 8.4 million in net worth or more:
"The 1 percent threshold for net worth in the Fed data was nearly $8.4 million"
Source: http://economix.blogs.nytimes.com/2012/01/17/measuring-the-t...
http://www.nytimes.com/2012/01/15/business/the-1-percent-pai...
https://www.reddit.com/r/AskReddit/comments/2s9u0s/what_do_i...
There seems to be a pretty big difference between 10m and 1b.