Income tax is by it's nature a transaction tax: income is taxed when money changes hands. But that income is counted as income each time it changes hands, so that's not "double taxation." Say we have an economy with just you and me. I make $100. I'm taxed $20 (20%). I give you $80. You're taxed $16 (20%). Total income = $180. Total taxes paid = $36 (20% of $180).
The mistake is assuming that the corporation's money is the shareholder's money the minute the corporation makes it, i.e. that the corporation is a mere proxy for the shareholder. It's not. The corporation is a separate person. If the corporation incurs a liability (say one of its trucks runs someone over), it's not automatically the shareholder's liability, again because the corporation is a separate person. A dividend payment is no different than the payment between you and me in the example above. It's not "double taxed"--it's taxed each time it is counted as income, the same as every other payment.
There is a deep symmetry here between how income is treated between separate entities and how it is taxed between separate entities. Say we have a married couple. The husband stays at home and does housework, and the wife gives him a $1,000 a week allowance. If they divorce, but the husband still does the housework in return for $1,000, then GDP (i.e. the sum of national incomes) goes up by $1,000. This is the nature of the GDP calculation--when you break apart an internal transaction and make it a market transaction, GDP goes up without anything else changing. Taxation precisely mirrors this. The husband doesn't pay taxes on his $1,000 while he is married and part of the same taxable entity. It's not income to him. But if they divorce, it becomes income to him. GDP goes up and taxes go up by the same proportion.
Income tax is by it's nature a transaction tax: income is taxed when money changes hands. But that income is counted as income each time it changes hands, so that's not "double taxation." Say we have an economy with just you and me. I make $100. I'm taxed $20 (20%). I give you $80. You're taxed $16 (20%). Total income = $180. Total taxes paid = $36 (20% of $180).
The mistake is assuming that the corporation's money is the shareholder's money the minute the corporation makes it, i.e. that the corporation is a mere proxy for the shareholder. It's not. The corporation is a separate person. If the corporation incurs a liability (say one of its trucks runs someone over), it's not automatically the shareholder's liability, again because the corporation is a separate person. A dividend payment is no different than the payment between you and me in the example above. It's not "double taxed"--it's taxed each time it is counted as income, the same as every other payment.
There is a deep symmetry here between how income is treated between separate entities and how it is taxed between separate entities. Say we have a married couple. The husband stays at home and does housework, and the wife gives him a $1,000 a week allowance. If they divorce, but the husband still does the housework in return for $1,000, then GDP (i.e. the sum of national incomes) goes up by $1,000. This is the nature of the GDP calculation--when you break apart an internal transaction and make it a market transaction, GDP goes up without anything else changing. Taxation precisely mirrors this. The husband doesn't pay taxes on his $1,000 while he is married and part of the same taxable entity. It's not income to him. But if they divorce, it becomes income to him. GDP goes up and taxes go up by the same proportion.