Panel 1: The following morning, we find Elly in her housecoat sitting on the couch asking Farley why people aren't content with what they have and why they always want more.
Panel 2: She continues on by asking why, when people have everything they need, do they still want the biggest, the best, the loudest, the fastest and most exciting?
Panel 3: Since she and Lynn would call "hedonic adaptation" gibberish, she wants to know why people throw away something good for the sake of something new.
Panel 4: The non-sequitur conclusion she comes up with is that maybe if money's not the root of all evil, insecurity is.
Summary: Elly is sort of the wrong person to ask this because her contentment with what she has tends to have a half-life measured in the picosecond range. Since she can't be happy, she's the wrong person to speculate as what makes others content.