My plan would have 3 parts. I like a flat tax, I doubt it will ever happen, but if we could get one I would be happy. Cruz proposes that (at 10%). I am fine with his proposal to eliminate all deductions but mortgage interest and charity. I would definitely tweak that some – no more than $50,000 in mortgage interest deduction a year and the same for charity. Basically subsidizing it a bit for the non-rich is fine. Subsidizing these for the rich seems silly so I would cap the deductions in some way.
Increasing the giveaways to trust-fund baby as Cruz and Trump propose is the single worst tax policy change that can be made. I have explained previously how bad an idea this is: The estate tax is the most capitalist tax that exists.
Social Security taxes are nearly equal to other income taxes. They are highly regressive. I would eliminate the current elimination of the tax on high income earners. I would just have the tax due on all earned income (no cap). If that let me reduce the rate, great, if not fine it would just make the fund solvent for longer. I would not increase the benefits due for high earners beyond what it is now.