You seem to be either a distant relative or a beneficiary of this system. Lot of people go for re-employment. Normally, in ALL professions there is a binding clause that they are NOT supposed to go for a profession where their previous employer has an interest. Obviously this clause does not exist in case of Indian government. But it still remains UNETHICAL AT LEAST for the cheif election commissioner to accept a ministerial berth in the SAME GOVERNMENT which was formed as a result of the elections that happened while he himself was on the helm of affairs.
YOU WONT PROBABLY UNDERSTAND. CORRUPTION IS TOO DEEP SO THE ACCEPTABILITY IS QUITE HIGH.
