Often in IELTS Writing Task 2, you get questions that ask you to write about the government. As a former IELTS examiner, I have marked many IELTS Task 2 essays and one of the most common things I saw was 'the government' used over and over again. This is a red flag to an IELTS examiner (a warning) because they do not like repetition. Watch this video to learn some useful and complex words and phrases for writing (and talking in IELTS Speaking Part 3) about the government.
IELTS Writing Task 2 - Writing about the Government (Lexical Resource)