When Robbie Robertson- half native-American- complains to Martin Scorsese in "The Last Waltz" that the Tin Pan Alley-era songwriter was "the low man on the totem pole" he's apparently not accurately reflecting any consistent artistic or cultural tradition in the hierarchical arrangement of these images, but is speaking in common American vernacular. So says Wikipedia, at any rate.
The meaning and arrangement of these carved images varies from region to region, tribe to tribe. In some traditions, there's even a "reverse hierarchy", with the most important image at the bottom, supporting the rest.
Some totem poles are records of lineage; some representations of natural forces; some are even memorial monuments, with the remains of the deceased incorporated into the structure.
It's true that certain tribes apparently erected "shame poles", recording unpaid debts or other crimes- so perhaps that was the sense in which Robertson was using the expression?
What they aren't are objects of worship. When a tribe moved on, the poles were left in place to rot.
The Wikipedia entry is a good read.
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The salmon-falls, the mackerel-crowded seas