I don't think that's true. Small business usually have less salaries because there is no corporate overhead and a big part of the staff is the owners who are no

I don't think that's true. Small business usually have less salaries because there is no corporate overhead and a big part of the staff is the owners who are not paid through salaries but dividends. Also small business often pay more than big corporation for low level jobs because they cannot afford the same turnover, and salary increases tend to be proportionally higher for the very lowest salaries than those just above (you go from 10 to 12 for instance, but only from 12 to 14 which is relatively smaller increase).