(b) In acts of corruption, the focus is often only on the demand side of the equation, on public officials who abuse their office for private gain. Frequently, the supply side is given less attention. Those who pay bribes are sometimes depicted as innocent parties and victims of extortionary practices of wily public servants. Do you agree that 'collusive corruption', in which there is a willing bribe-giver, is a formidable challenge for institutions fighting corruption? (Answer in 150 words)