How about this great Sinéad O'Connor track? I came to it by way of an excellent Joss Stone cover. Its starkness and power (particularly in the original) place it in a long line of political songs inspired by real events which goes back at least as far as Woody Guthrie and probably a lot further.
Not of course the only great song to mention Margaret Thatcher (jump to the performance at 4.01 if you wish but the discussion is unusually informative).: