Smalll Businesses

I was under the impression that small businesses were ineffecient because they employed too many people, as an aggregate.For example, if we broke up a Best Buy shop into smaller shops that produced the same amount of aggregate sales, wouldn't we see more employees with the bunch of smaller shops instead of just one big Best Buy?If we took Amazon's sales and put those into big box retail stores, we would see another big increase in the number of needed employees, from what I have been told.

Does this number scale depending on the number of employees?Just as a comparison, as a high school/college student I worked at a big meat packing plant, and I was also close with the family who owned the local butcher shop. From my own limited exposure, the amount of meat processed per person was much, much higher at the meat packing plant than at the local butcher shop. Perhaps this is an isolated case that doesn't scale to the rest of the economy, but this is a view I thought was common amongst economists. I could be wrong though.