You know what kind of tax reform actually would fit on a post card and be very easy to deal with? An income tax where ALL your income is taxable, with no exemptions, deductions, complications or whatever, at all, and then a VERY progressive set of marginal rates: no tax at all for people below the 30th percentile, a modest (say 12% or 15%) for amounts ranging from the 30th percentile to 80th (or so), and then several tiers over that, 90th percentile, 95th, 99th, 99.9th and so forth, up to the AOC 70% on amounts over $10 million type level.
You plug in your total gross income, look up your tax on a chart or app, done. No other BS at all. The chart or app takes care of all the calculation crap.
If the marginal rates were sufficiently progressive, it would be great.