Bad people, asked by honest ones to do something for them, consider themselves as honest after doing very doing very little of that, even though they are well-known to be dishonest.
तावन तस्य सुकृतं किंचित्कार्ये कदाचन। मन्यन्ते सन्तमात्मानमसन्तमपि विश्रुतम्॥