Lobbying is the act of attempting to influence government decisions, usually by means of bribing officials to make certain decisions. Cannabis is illegal for this reason.  Corporate lobbying is an example of crony capitalism. Inevitably, corporate lobbying leads to Plutocracy.
Voting will not do much. Politicians who pander to the rich and to corporations have a huge advantage politically, receiving large amounts of funding for political campaigns. Honest people are considered unelectable.