I feel like you missed the point completely. Did you read the article at all? The social workers in the article are also professionals working for a paycheck. The operative difference is that a baker produces bread: If they can produce (say) 100 loaves for 100 people in a day, you have a 1:100 producer:consumer ratio, and with a bigger oven you could probably double that. Conversely, a social worker cares for children at close to a 1:1 rate, with one worker per child, and you can't do much better than that. Regardless of a social worker's motivations, their productivity is limited by the fact that they are doing the labour of caring.