Should more bosses write letters to employee's parents like PepsiCo's CEO?

Employee recognition can take many forms: a quick thank you; an increase in pay; even staff days, restaurant trips or taking staff for drinks at the company's expense. 

PepsiCo CEO Indra Nooyi has taken employee gratitude more than a few steps further, writing over 400 letters a year to the parents of her high-performing senior executives – reports MSNBC.