By Andrew MacAskill and Elizabeth Piper LONDON (Reuters) – Daniel Pryor, who lobbies for governments to shrink the state and cut taxes, feels Liz Truss’s brief, disastrous spell as prime minister has killed off his dream of a low-tax, deregulated British economy for at least a generation. Pryor, who works at the Adam Smith Institute in London, laughs bitterly at the irony that Truss, who said on Thursday she would resign, was forced to abandon her libertarian economic policies by the same free markets she cherishes. The Adam Smith Institute, and other think tanks which provided much of Truss’s…