Since I cannot respond to everyone that broke of this binary tree and I take you for the view points.

Let say you won the lottery, now you can buy that dream house. Do you get a mortgage or pay off the sum in the cash on hand so you are not losing moneys in interest payments? Why waste money on interest and save in the long run? Which is it, take a mortgage or pay interest?

Take the mortgage and the tax deduction. First open a trust or a shell company. Move $1,000,000 into it to back the house purchase as Lender X. Take a loan against Lender X, which is yourself. Now on the tax deduction, state the amount of interest you paid to yourself as mortgage interest on your house, since you could / didn't pay in cash. Use this to place yourself into a lower tax bracket and put some of those tax dollars into your account. Creative account is legal and can be exploited by the rich. Even more when you use money to maximize the legal loop holes by paying others to find and construct other legal loop holes.

Now try to remove that tax loop hole. Near impossible, this would remove that the tax loop hole that allows others not paying a mortgage to themselves, but to a Lender Y, a actual bank or credit union. This tax deduction is near impossible to remove because it cuts out the middle class and poor ability to buy a house.

Where is crime most likely to happen, in a city of 10,000 (A) or 1 million (B)? 10,000 is 1/100 of 1 million. Now where would you bet single (1) crime will happen, city A or B? City B 100 times more people to commit a crime than city A. Lets rephrase, you have the ability to take 10,000 (A) lottery different lottery tickets or 1 million (B) lottery tickets? Which would you take tickets A or B to maximize your winnings?

Cash based business that don't declare income in hospitality industry as tips. How many of those individuals make 10,000 or 1 million a year? How many people tip in cash versus in credit or debit card? More people have been using credit cards to make purchases versus paying in cash. When was the last time you payed in cash or be a party member in a pure cash based transaction in a restaurant? How many people use their company business credit card to pay for corporate deduction dinners and how many pay in cash?

How do you plug this legal loop hole that places more tax dollars into a rich person's hands? Start by shifting money into a trust or shell company. Pay an artist $5,000 to create a new piece as Company X. Company X now auctions off the art. You, as the hidden supporter of company X, buy the art, and pay yourself at auction, for $50,000. Now you donate that art to a museum or other non-profit that fits the tax deduction bill. I just donated $50,000 because I made the declaration that $5,000 is actually $50,000 as proven by my auction bill, secretly paid to myself.

Lets deploy a use tax. A person that drives more should be paying more for the road, repairs and maintenance. How much do you use your vehicle for person versus business? How much of your driving is just to get to work and back home, or driving from work to lunch and back to work? I'm using my car 80% for work driving to and home, and only 20% for personal. My use tax should be 20% of what I own, my employer should be paying 80% of the usage because it is being used to benefit them, but since I am the owner of the vehicle I pay 100% of the use tax. Now I am being taxed 80% to be employed.