Do we really need OBC Reservations?

For the past few months we have been hearing a lot on the debate of reservations. I tried to get a clear idea about the whole issue. But it proved to be a Herculian task. The reason is that I have too many questions and far too less information on the actual issue and the related history and statistics. So I thought some one out there can clear my doubts and I can finally get a clear idea and an opinion about the issue. And the questions and doubt that have been eating out my whole brain and time are:

Need for resevations?

Justification for the resevations?

Is it just because those concerned are historically oppressed?

How can reservations help backward classes come over social discrimination?

Do they "all" really need them?

Are they "all" still oppressed ? And aren't any one else?

Is it whole thing tenable?

What about others from poor and economically families from the so called forward classes?

And what about others from far flung and rural areas who aren't aware of any laws or privilages?

What's the need for inclusion of Creamy layer?

Are the benifits really reaching the most needy?

Can't we increase the size of cake insead of fighting over who should get how much?

Do we really enjoy the freedom to the course of choice to learn the things we like , the way we like?

And is the idea of reservations in jobs really justified? And do we really need them in private sector too?

I hope I can really know the answers to all these issues and can one day post my own opinion. Please, if you happen to know any thing related or have an opinion, please post them in the comments column.