Complex sentence: The power of private Sector lobbyists is made even more power with the trend of revolving door lobbyists, when those who previous worked within government and gained knowledge of it, then enter the private sector to lobby.
Split into simpler sentences: The power of private sector lobbyists is made even stronger with the trend of revolving door lobbyists. This is when those who previous worked within government and gained knowledge of it, then enter the private sector to lobby.