The idea that taking good care of leads to happy who in turn make employee happier is known as a virtuous cycle.

- Employees, Customers.

Explanation:

As per the question, the idea is associated with the happy and contented 'employees' lead to gratified and joyous 'customers' who would, in turn, lead to making the employees delighted. This cycle is popularly known as a 'virtuous cycle'.

The basic idea conveys that if the employees remain cheerful and contented they would work diligently and evoke favorable outcomes for the firm and that would return in satisfied customers and further these happy customers would encourage the employees to work more happily and efficiently. This cycle keeps the flow of gratification intact in the cycle and as a result, the outcomes are favorable.