You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Friedrich_Hayek

Context:
In 1977, Hayek was critical of the Lib-Lab pact, in which the British Liberal Party agreed to keep the British Labour government in office. Writing to The Times, Hayek said, "May one who has devoted a large part of his life to the study of the history and the principles of liberalism point out that a party that keeps a socialist government in power has lost all title to the name 'Liberal'. Certainly no liberal can in future vote 'Liberal'". Hayek was criticised by Liberal politicians Gladwyn Jebb and Andrew Phillips, who both claimed that the purpose of the pact was to discourage socialist legislation.

Question:
What was the name of the agreement Hayek criticized in 1977?

Lib-Lab pact