It was originally done though. It you search the internet you'll easily find picture of men stood in workshops, stood at machine tools wearing suits and hats. I have pictures in my office of gangs of Victorian bricklayers working on railway viaducts and all to a man wearing coke hats! They look better than 90% of the WAYWT posters. Overalls are better, because they are safer (less loose clothing) easier to clean, less expensive to make and so on.