Editorial: Any democratic society is endangered by segmentation into classes of widely differing incomes between which there is little mobility.
Conclusion
Democratic societies should adopt policies that ensure constant economic expansion.
Evidence
Economic expansion gives people more opportunities to improve their economic standing.
When democratic societies segment into different income classes with little economic mobility (i.e. bad income inequality), that society is endangered, since class divisions strengthen divisive political factions that impede good governance.
Evaluate
In a general sense, this argument is saying When Y occurs, democracies face problem X. Thus, democracies should do thing Z.
What is an argument like that assuming? It assumes that thing Z would be good at preventing Y.
Our conclusion is recommending "policies that ensure constant economic expansion", but the evidence never talked about constant economic expansion. What is the author assuming you get from constant economic expansion?
We would assume she's saying "constant economic expansion" helps us to avoid the problem of .
Goal
Look for an answer providing some evidence that economic expansion is linked to