These days, people who do manual work often (11)
far more money than people who work in (12) .
People who work in offices are frequently referred to as "white-collar workers"
for the (13) reason that they usually wear a collar and tie
to go to work. Such is human (14) , that a great many people
are often willing to sacrifice (15) pay for the privilege of
becoming white-collar workers. This can give rise to curious situations.