Disgruntled civil servants,why don't they just get a better job?

For one we are not greedy, we only get paid just above the minimum wage, we work hard we don't just sit back all day we work hard and for what to get abuse off the people on benefits. I work in a job centre and i've been attacked with a knife, had bins thrown at me the list goes on.... Why shouldn't we strike for better pay and conditions, if you worked for them you would. Some of us actually like are jobs and don't want to be on benefits!