Should not be - Harlow found that baby monkeys removed from mother at birth got kept with a wire mother and cloth mother, spent 80% of time with cloth mother but went to wire mother for milk, so found comfort in food which can be from someone other than their mother. PCG goes beyond feeding the child, need comfort and doesnt have to be the mother. Women can go to work and it wont have a big detrimental impact on the child so has an impact on the economy.