In the Tropico 4 DLC Modern Times, you get a Supermarket: it's like a Marketplace in that it serves as a food-distribution point (so people don't have to hike out to the farms), but can store more food, change the type of food it sells (healthy/junk food), and employs 4 people. Marketplaces only ever require a single worker, and I haven't yet seen people starving because they were waiting in line.
In some Modern Times campaign missions, you start with a Supermarket. Early in a game, tying up four high-school-educated workers in a Supermarket is a waste of educated workers. I usually fire three of them so I can use those educated workers elsewhere, but what's the effect of this on the building's services? Do fully-staffed Supermarkets serve people faster, or have a higher service quality, or serve higher-quality food, or what?
Best Answer
It would appear that the number of workers has an effect on it's work modes.
Since the work modes affect food quality vs. life expectancy, more workers would make that Junk food / Healthy food choice more meaningful.