As Sen. John McCainJohn Sidney McCainThe Hill's 12:30 Report Senate gets to work in August — but many don’t show up Rand Paul’s Russia visit displays advancement of peace through diplomacy MORE (R-AZ) declared in his opening statement, “Apple's corporate tax strategy reflects a flawed corporate tax system that allows large multinational corporations to shift profits offshore to low-tax jurisdictions."

My concern is with a corporate tax system that allows one of the world's wealthiest corporations to avoid tens of billions of dollars of tax on profits through use of research and development cost sharing, transfer pricing with affiliates, gaps in anti-deferral provisions, and not distributing offshore earnings. How can this type of practice engender trust by the American public that our tax system is just?

If this type of conduct is not dealt with quickly it will further encourage a race to the bottom by multinationals and others. It's a zero sum game and if some U.S. based multinationals substantially minimize their U.S. tax burden with such practices, other entities or individuals will have to make up the difference. A tax system that's viewed as rigged is corrosive to our society.

Apple is entitled to a great deal of praise for its success in business, leadership in technology innovation and creation of jobs. Apple being an ‘American success story’ shouldn't, however. serve to mask the fact that our laws for taxing multinationals allow this abuse to occur.

There are some, like Sen. Rand PaulRandal (Rand) Howard PaulHillicon Valley: Trump escalates feud with intel critics | Tesla shares fall after troubling Musk interview | House panel considers subpoena for Twitter's Jack Dorsey | Why Turkish citizens are breaking their iPhones Overnight Defense: Trump cancels military parade, blames DC for cost | DC mayor hits back | Pentagon warns China 'likely' training for strikes against US | Turkey refuses to release US pastor On Russia we need diplomacy, not just sanctions MORE (R-Ky.), who argue that the Senate Subcommittee's action amounted to a vilification of Apple and that Apple's failure to engage in such practices to minimize its income tax bill would amount to malpractice. I believe many Americans who are aware of what's going on will have a different reaction. It's a further example that the tax system and perhaps government in general is fixed, and those who make substantial campaign contributions write the law that results in such inequity.

I'm not concerned with how little foreign taxes companies like Apple wind up paying. My distress is a tax structure that allows very successful innovation taking place in the United States resulting in enormous profits to escape much U.S. taxation. This U.S. tax base erosion and profit shifting is something that must be curtailed not only for the revenue loss but the message sent.

Congress needs to not only, as Sen. Carl LevinCarl Milton LevinConservatives see Kethledge as 'Gorsuch 2.0' How House Republicans scrambled the Russia probe Congress dangerously wields its oversight power in Russia probe MORE (D-MI) stated, to shine a light on such practices but to remedy the situation without delay. U.S. companies without foreign operations shouldn't be put in a competitive disadvantage. Neither should those U.S. based multinationals who do not pursue tax strategies like those utilized by Apple.

The answer is certainly not the enactment of a territorial tax system that would provide a statutory basis for eliminating U.S. income tax on most foreign earnings. This would serve to further encourage not only profits but jobs moving offshore. Neither would permitting multinationals to repatriate offshore earnings at substantially reduced tax rates as is advocated by many companies. This would further exacerbate the inequities in the present system.

It's not just too much taxes that bother many of us but the gaming of the system by the powerful and the well-connected, even those that make great products. Our tax system must promote equity and fairness and not the utilization of egregious loopholes to shift the burden to others.

Cohen is a tax professor at Pace University’s Lubin School of Business and a retired Vice President-Tax & General Tax Counsel for Unilever United States, Inc. The opinion expressed here is his personal view.