Working Tax Credit (WTC)
  
A tax credit that really gets out there and hustles. You show up at the office in the morning; the tax credit is already there, at their desk, toiling away. You leave at night...the tax credit is still there.
Also, it's the name of a particular tax credit in the U.K. The benefit applies to low-income workers. The credit can be claimed by people who work a minimum number of hours, but still receive an income that comes in below a certain threshold.