I generally associated the term corruption with illegality. The Pope identifies a broader definition and context.
Pope Francis: ‘I Am Not Afraid of Sin, I Am Afraid of Corruption’, 23 Jan 2018, Breitbart.com
“Corruption – when a person’s conscience no longer registers right and wrong.”
“There is a big difference between corruption and sin, Pope Francis contends, because the sinner can always convert but the corrupt person sees no need for conversion.”
“The corrupt person goes through life taking the shortcuts of opportunism,” said the Pope, “with an air of innocence, wearing the mask of an honest person, which he begins to believe.”
“The corrupt person cannot accept criticism, discredits anyone who criticizes him, tries to belittle any moral authority who would question him, does not value others and insults anyone who thinks differently. If the balance of power permits, he persecutes anyone who contradicts him.”
“Unfortunately, Francis said, the problem is widespread.”