Importance of part time job or business

As a person advances in his career, he grow up his skills, human network , resources and management skills.

But due to politics and sycophancy rampant in the corporate world, he may not be given the right job, as it happen with millions of Indians, in such scenario shall one just spend his time on his hobby / leisure or go for politics / social service or enter into part time commerce related activity.

I think the area chosen comes out from person's background, environment, spare time amount and economic necessity.

If this energy/man hours are effectively utilized then this workforce of millions due to their own motivation factors can generate significant economic output.

But what about millions of those who are not even engaged partly in economic activity least to say of part time? Anyway, i am not a public policy maker and i leave this query for them.