| The Tokyo economy grew so fast in the 1980s that the city faced a shortage of blue-collar workers. |
| He treats everyone, be they blue-collar workers or heads of state, with the same respect. |
| Obviously, this applies not only to blue-collar factory workers, but to people who work in offices or the service sector. |
| There have also been large numbers of blue-collar workers in service and garment industries. |
| Both are blue-collar workers, and both have enough size, strength and savvy to clog up the middle. |
| Technically they belong to the cops, but city blue-collar workers have access to them as needed. |
