Cruz is undoubtedly taking money from lobbyists. There are lobbyists I share common goals with and lobbyists who wish to influence the system in ways I disagree with.
The key to getting rid of the corrupt system is to burn the product they are selling - government power and influence in our lives. Do you think Trump is running to get control of all that power so he can give it back to the people? That would be entirely inconsistent with Trump's history, his style and his statements.
Cruz is undoubtedly taking money from lobbyists.
And therein lies the problem. Not just with Cruz, but with 16 of the 17 candidates.