Service sector in India employs two different kinds of people. Who are these?

As we all know that service sector is also known as tertiary sector. And tertiary sector employs more and more people. It employs two different kinds of people and one of them is the workers that are well educated and highly skilled. And the other is the workers who are engaged in services such as small shopkeepers, mechanics, transport, persons, etc. And these poor people barely get the time to manage their own livelihood.