Commentary for Job 27:12

all of you have seen that this is the portion of a wicked man.

Job now turns on his companions accusing them of hypocrisy. Their contention that the wicked who prosper in this world receive their true deserts after their death is humbug and in their heart of hearts they know this. He dies happy, surrounded by his wealth. Whatever happens later is of little or no concern to him; he does not experience any of it.

now why do you become altogether vain? To be wicked and hypocritical.