[3dprintscanner]

It's taking the approach that the best way of gaining wealth is to convert earned income into unearned (passive) income over time. That once the basic necessities are covered the bulk of your nontrivial expenditure should really be investments and that your elective consumption should be pegged to some nominally small percentage of your overall wealth. I think this has to come from a place of having something to fall back on at a certain level of wealth, you can take the risk on those investments if the downside wouldn't be any worse than losing your current 'level' of wealth.