Tax is vastly beyond an employee's payslip.
Take Starbucks for example in the UK. The tax rate in Luxembourg is much less, so Starbucks UK taxes and makes, say three million profit. So they should pay corporation tax on that amount. But, Starbucks Luxembourg charges Starbucks UK three million consultation fees, so now, Starbucks UK made £0 profit, so it's tax burden is £0 too. And it's all in the tax rules. So try to close that, somehow, and what next will Starbucks do?
Same with Apple, they channel their money through different countries for tax reasons. What we have to remember is, the more wealthy you are, the batter the accountant you can hire to save you a fortune in tax. So when someone says, "Tax them properly", I say, "How?".
I remember donkey years ago Gordon Brown (UK) said he wasn't gonna bother trying to bung up tax loopholes, because whatever you do, they always find new ways. And all that's within the tax rules.
Top bosses don't get a payslip or wage like a regular employee, so what are all the different ways on how they get paid/rewarded?