This insightful cartoon by cartoonist Chris Wildt criticizes interest groups by showing an adult person, probably a father or a grandfather, telling a little boy that he can be a president when he grows up, but that, if he wants to have power, then he should think about becoming a lobbyist, since they are the ones, so the adult man seems to believe, that can truly effect change, that can really influence the decisions of the government.
If the cartoon is referring to the U.S. context, it is possible to agree with the cartoonist, because lobbying organizations (which are numerous in that country) in the United States have an unquestionable influence on the political realm, with lobbyists that have gone as far as to buy senators' votes in order to make their claims heard and successfully influence the decision making.