As others have stated already, economic ci
As others have stated already, economic citizenships are available, but they are hardly cheap.
If you are looking for inexpensive options, the only one that I know of that fits that label is Panama's "Friendly Nations Visa." You need to have $5,000 in a bank in Panama, come from one of the "friendly nations," and have some connection to Panama (business, house, etc.).
Purportedly, you can gain citizenship after 5 years. The program is new, so we'll see.
I am exploring this option myself. I am in the process of buying a house in Panama, so I've got that part down. Now I just need to get some money down there and pay an attorney for the paperwork part of it.
I've seen some stuff out there on the inter-webs about the Dominican Republic and Paraguay that may or may not have any truth to them.
Because these things take time, and you are dealing with people thousands of miles away, who may also be attorneys or worse, it's all a gamble.
Research your options thoroughly, and then double check your reasoning before sending money.