Actually, it is more complicated than that.
Each corporeal SAM unit is required to be small by natural necessity. So it isn’t due to a man-made rule that the unit remain small, but rather a physical requirement due to the priorities involved in the basic SAM architecture. That makes it less susceptible to lustful corruption on the very most basic level.
And although each SAM unit is very small, there are millions of them. They are similar to the cells in your body and are networked together by the only pre-designed portion of any higher governance, an artificial neural network similar to the internet, the “Angel Network”. The Angel Network is the information distribution architecture and is analogous to the brain of the human body. But the brain is not the mind (despite what they try to tell you). The mind and body form through natural, “evolutionary” pressures as they arise and are handled by the SAM units individually.
Any and every higher governance architecture other than the Angel Network is freely chosen and unchosen by agreement between the SAM units using the same constitutional algorithm used within the units.
So on the lowest level are the living humans and their talents and tools. The next level up is the living SAM “cell”, a constitutional family group. The next level up is the living organs formed by local demographic needs. The next level up is the overall Body of SAM’s humanity. And the entire structure is built upon and coordinated through the Angel Network as the people respond to their actual, individual, immediate needs. In effect, other than the cell architecture and Angel Network, reality itself dictates the governance methodology moment by moment. The governing method can change, similar to the USA’s proposal when changing into a war status, except (again) due to natural physical issues, the government method cannot be entrapped into a non-constitutional fascist system.
So the higher Body of SAM is governed by the physical apparatus of the Angel Network, the SAM cells autonomously responding to their individual needs (much like individual families), any cooperative choice those cells make through their higher constitutional architecture utilizing the information distribution architecture, and the demands of the “outside” world (perhaps resource issues or a country choosing to go to war, terrorize, or embargo).
It is all a little similar to the Imperial cities of Europe, although very, very much more precise, distributed, and open.