People rent a home, and then exploit the democratic process in a beggar-thy-potential-neighbors strategy. They use things like rent control and other anti-migrant policies (e.g. anti-Google bus policies in SF, anti-Hijab laws in France) to enrich themselves at the expense of others.
Because her wealthy uncles lost their job, and had a small drop in their standard of living, "Andrea" wants to screw over a bunch of desperately poor people a world away.
Unlike "Andrea", our elites behave far better. Populists try to protect their favored ethnic groups - witness Shiv Sena trying to pass laws preventing non-Marathis from driving taxis, or "tech bros" entering SF. In contrast, I've never heard a white banker complaining about allowing a Marathi to be the CEO of Citi. Elite institutions - think of banking or tech - tend to be truly global enterprises, open to anyone who can demonstrate the requisite ability.
Somehow the author doesn't draw the obvious conclusion: that our elites are honest, moral and principled individuals, while our masses are selfish, tribal and greedy people out to beggar their neighbors. For good policy making the conclusion is that we should try and increase the power of the elite.