Lobbying has become a powerful multi-million dollar industry in Australia.
It's also become a lucrative career path for many former politicians who can use their connections and inside knowledge to influence public policy for their paying clients.
In some cases — ministers have left government and walked straight into a lobbying role.
And while there's an official list of 'registered lobbyists' — there are plenty more people not on the list — like union officials and board members who are bending the ears of politicians.
Tasmanian Senator and key crossbencher Jacqui Lambie believes it's time for a shake-up.
She's campaigning for tougher rules around political lobbying.