alarm clock
calculation
check
coin
comparison
cost
difference
differential
earning
economic
employee
employer
figure
gap
hours
income
income gap
inequality
labor
laborer
male
man
measurement
men
miniature
minimum wage
money
monthly
pay
payroll
people
person
pile
poor
poverty
relation
relationship
rich
salary
stack
time
unequal
unfair
wage
wealth
work
worker
working hours