Cratchit is Scrooge's overworked employee, a timid man afraid to stand up to his boss's demanding ways.
Scrooge's clerk, a kind, mild, and very poor man with a large family. Though treated harshly by his boss, Cratchit remains a humble and dedicated employee.
http://www.sparknotes.com/lit/christmascarol/characters.html
Note that Cratchit also delivers a toast in his boss' honor regardless of the way he's treated (Mrs. Cratchit grimaces). Bob is a loving family man with a good Christian heart, and regardless of Scrooge's treatment of him, he is always respectful. The man isn't paid enough money, has a dying son, and a wretched boss, bit none of these things shadows his demeanor or effects the way he treats others................ Cratchit is a good man.
