You may be true from the statement.

But apart from greed, there are some trust issue.
1) As said and analyzed before, this scheme use high commission to motivate the agent.
2) In order to get higher success rate and easily deal, these agents usually start from their friend/relative/partner/family and etc
3) Due to trust, most the targeted investors would invest.
Just like if your hubby/wife or kid ask u to buy something, will you reject and talk much?

The agent abuse the trust of those people believe in them.
When thing burst, they would said they were victim also as they also purchase/invested.

Are they innocent?
Suddenly i remember a word from Putin when i am eating Pudin before go to Mydin.
"whether forget/forgive you is god/allah issue, i just send you to them"

Remember to keep your middle finger....
it may be useful....

Because i think these kind of Ponzi scheme never end.
When a name fall down, another one already setting up.

year to year we heard the same story....