Well, at least that's how things were about 10 years ago when I left - it could have changed a lot.
There was some economist who estimated that if a business in Russia pays EVERY tax it's supposed to by the law, it will pay way over 100% of the profits in taxes. So technically there is no business that is following the law 100%, giving the 'controlling organs' the power to ask for bribes. Could be an urban legend though, I don't have links.
Edit: The parent talks about general taxation, and my take is about the taxes a company has to pay for each employee on top of her salary. Still, I think, "white" and "grey" salaries is an interesting point.