Corruption

I still have a great respect for the Sikh Community as a whole and The Gurus in particular. Guru Nanak Dev preached equality and truthfulness to his disciples. All my life I had association of Sardar’s as friends and I always admired their broad mind and broad heartedness. This was till I meant a corrupt scheduled caste Sardar as my superior officer. Till that time I was under the belief that no Sikh would prefer to be labeled as a scheduled caste person for the paltry advantages of a government job.
After Sonia Gandhi appointed her puppet as Prime minister, my respect for the Sikh community went a little more to the down side, thinking that for the benefit of a royal funeral a Sardar opted for the subservience of a foreign lady.
Iam still unable to understand as to which faction of sikh community appealed to the Government of India to Include Sikhs also in the Schedule of backward castes?
Can any one clarify How this is not against the teachings of Guru Nank dev?