Non-traditional invasion

The way I understand it our politicians create laws largely, if not completely, based on the influence of tens of thousands of registered lobbyists. It seems like any other country that wanted to gain control of our country could simply funnel money through some of those lobbyists to shape our country to their will without the expense and inconvenience of sending troops to stage a traditional invasion. Perhaps a good strategy would include disarming the citizens and creating a massive debt to enslave the population.