Because everything is better if you do it in secret. 😆
For a full understanding of their methods I suggest looking into this.
Alinsky for Teacher Organizers was written in 1972 for use in the training of teachers. If many recognize it as the facilitative process, the Delphi technique , to which they have been exposed, such is because they are one and the same. This process has been around for a long time, being perfected and fine-tuned , awaiting the time when it would be implemented extensively in the interests of transforming America.
Their goal is a secret vote. Only the vote counter gets to decide the result.
You will see this at work in "public" meetings.
Ever walked out of a public meeting thinking ... wow I guess I'm the only one who feels this way?.