I would hope that the Costa Rican government and banking system can find an appropriate response to the influx of dollars into the country. If there is consideration given to a surcharge, why not place that on the earnings from savings here rather than all income coming from the U.S. Social Security recipients depend on their small checks to live down here, and I doubt they are contributing to this problem as they use the money for living expenses not investment and savings.
Expats here contribute in many ways to the economy, and we are being asked to pay more every year. One more hit like a surcharge on income from the U.S., and many will be forced to move. This would be very unfair and counterproductive for the country.