I doubt that I need to discuss what it means to “hunger and thirst for righteousness” so let’s jump directly to what will become of the one who has no such desire. I think we can safely assume that the one who has no such desire will not be blessed, and one who hungers and thirsts for wickedness will not only find what they are looking for, but they will also find God’s curse in His judgment. Such a person will always need to be looking over his shoulder, will be running from the law, and will seldom have a restful night’s sleep; if they are lucky, they’ll live long enough to die from stress related illness, if not they will die by the sword. Anybody want to sign up for that?
As with the other beatitudes, there is an apocalyptic element to this (see Isaiah 61). God’s ultimate gift to Mankind is the gift of righteousness, for when Jesus returns and culminates his Church, all evil will be eliminated and the righteous will abide eternally in His Kingdom without pain, suffering, oppression or death: Blessed indeed!