I disagree .
My attitude is always put 100% effort into work at all times no matter if it's sweeping the floor or rebuilding an engine ..
That's maybe why I never struggle for work.
I worked at a place through an agency as a fork truck driver to cover some one off sick and the company were that impressed they made a permanent position for me , and then promoted me to machine operator in less than 6 month, above anyone who worked there , not bad for someone who didn't have a clue how to operate the machines when I first started .