I've always felt that 'moral barriers' were the main forces which have allowed capitalism to operate relatively smoothly in the past (at least in some countries

I've always felt that 'moral barriers' were the main forces which have allowed capitalism to operate relatively smoothly in the past (at least in some countries). That's why I've always been against Milton Friedman's philosophy that each person should only be motivated by-self interest. In many ways, this philosophy is the reason why we ended up where we are today; with a deep and growing class divide fueled by colluding self-interests, moral depravity and hypocrisy. This is because self-interest and cooperation are not mutually exclusive; it's the opposite; they are mutually reliant. But cooperation born out of self-interest does not yield the same results as cooperation born out of altruism and a sense of moral justice or collective pride.