What’s the -ism that portrays this outlook. This forgotten -ism is related to — BUT NOT — capitalism, corpocracy, cynicism, Marxism, misanthropy, nihilism, pessimism, socialism or skepticism. Such ideologues reckon that most things in life are greedy scams. Beneath are examples.
Cynicism in its modern sense is the -ism most related to the view that other people have motives worthy of skepticism. From WP:
Cynicism is an attitude characterized by a general distrust of the motives of others. A cynic may have a general lack of faith or hope in people motivated by ambition, desire, greed, gratification, materialism, goals, and opinions that a cynic perceives as vain, unobtainable, or ultimately meaningless. The term originally derives from the ancient Greek philosophers, the Cynics, who rejected conventional goals of wealth, power, and honor. They practiced shameless nonconformity with social norms in religion, manners, housing, dress, or decency, instead advocating the pursuit of virtue in accordance with a simple and natural way of life.
This is different, however, from the original philosophy of the cynics, and the two uses of the term shouldn't be confused.