You could also have some economic pressure (low wages from whole foods) causing fewer ethnicities to self select into the job because they have better options e

You could also have some economic pressure (low wages from whole foods) causing fewer ethnicities to self select into the job because they have better options elsewhere [1]. Then the workers realize things aren't so great and try to improve their situation through unionizing. [1] https://en.wikipedia.org/wiki/List_of_ethnic_groups_in_the_United_States_by_household_income https://en.wikipedia.org/wiki/List_of_ethnic_groups_in_the_U...