It is not simple Law of Demand in india where If salaries are increased corruption would decrease. In india it is Giffins Paradox. If salaries are increased corruption would also increase.
If we really need to control corruption we need to 1). Stop electing idiot and corrupt politician. 2). Govt employees are to be made accountable in every respect. 3). Once caught govt employees are to be sacked as in the case of most pvt organisations.