If one really wants to tackle the financial links between business and politics, one good starting point is to lobby for change in the loophole-ridden electoral expenses/revenue declaration for candidates. One can also look into 'invisible' money (undeclared, camouflaged, in kind etc, both in terms of expenditure and revenue) and agendas of networks close to politicians, both in terms of expenditure and revenue. But there are so many fingers in this pie that I wouldn't hold my breath. Many beneficiaries from this, no wonder it is elbowed out of the agenda!