Rent capture: landlords collect rent on the house they own the right to. Similarly, lets say the government or any contracts grants some body special privileges, the money they earn on those privileges in excess of what they would have otherwise is a rent capture. EG: lawyers get more money because only they are allowed to do certain legal work. The rate they collect in excess of what someone unlicensed but qualified would charge is a rent capture (rent seeking activity?[0]).

Fiat risk: inflation.

[0] http://en.wikipedia.org/wiki/Rent-seeking