The other reply is correct regarding the macro effects of the practise. The more immediate issue is that it allows shareholders to avoid paying dividend taxes. So they can effectively defer paying taxes until they realise any capital gains. This is a huge benefit, as the present value of money is worth much more than the future value of money. However there is an even larger benefit in the U.S. Dependents can inherit stocks at the current price and avoid paying any capital gains tax. This is called the “stepped-up basis.” It’s an insane tax loophole. Together stock buy-backs and the stepped-up basis allow the ultra wealthy to pay little to no tax, ever. They take out perpetual loans to pay for living expenses, guaranteed against their holdings.