Still, even taking it the way you say, the quote is false. Poor and weakened societies tend to get lost in vicious cycles, and tend to create damaged people who struggle for the rest of their lives with the effects of the shock - ill, relying on vices, corrupt etc. It takes huge luck and hard work to transition back to a successful, prosperous and healthy society.
Conversely, societies that become wealthy and successful tend to continue that way for a very long time, and they create healthy and ethical people much more readily.
This can be easily seen in recent history by looking at post-USSR states vs Western Europe & the USA. By any measure, people living in Western Europe for example in 1989 were living much easier times than those behind the Iron Curtain. Still, even today, 33 years later, Western Europe is vastly more wealthy, culturally active, healthy, more powerful militarily and in every conceivable way than former Soviet bloc countries - especially the former USSR ones.
One of the most important wounds that hard times leave in a society is an extreme form of screw-you-got-mine individualism. This leads to people who are willing to do anything to succeed and grow above others - especially manifested as corruption and nepotism at every level. When you have lived through times you either take what you can or die of hunger, you can't afford to care for rules or others' well-being (except your own family).
