Understanding the Indian Caste system

I was struck by the article in the papers and on the BBC.....

Trapped in the gutter: The street cleaner with four degrees Protected content

I quote "Sunil Yadav, a 36-year-old man from the western Indian city of Mumbai, is a fervent believer in the power of education.
His four degrees include a master's from the prestigious Tata Institute of Social Sciences (TISS) and he is now pursuing an MPhil - an advanced postgraduate degree.
However, according to his official identity card, Mr Yadav is still a sammarjak, which is an Indian word for a manual scavenger. A manual scavenger is someone who cleans human and animal waste from buckets or pits, and is performed by members of low-caste communities - and mostly by Dalits, also known as Untouchables.
Mr Yadav, a Dalit, says he was inspired by Dalit rights campaigner BR Ambedkar, who said that only education could bring about a change."

Surely this is the lie that is in Hinduism and in India - why are we outsourcing to this country that quite clearly does not recognise human rights, let alone democracy.