... it would be a tax cut, even for those with good accountants (but maybe not for those with the best accountants).
Let's examine that claim a bit...
Centuries ago, it was possible for the elites to claim "divine right of kings" and maintain their fiefdoms based purely on a supposed mandate from God. Taxes could be levied on the poor, while exempting the elites, because God wanted it that way. Today, the masses will not accept this. A "divine right of robber barons" is not going to pass the sniff test, so the elites must be able to at least make a plausible case that the state operates in the interests of the masses, not just a privileged few. Costs to run the country, and defend its existence need to take account of that reality.
The above reality being recognized, let us look at where the federal taxes levied go, and which uses of taxes you want abolished.
First, I assume you wish to abolish the (supposedly separately funded) social security and Medicare programs. With most businesses having eliminated their own employee pension schemes, this is the main unavoidable contribution they must still make. It means, of course, not just no retirement benefits (no problem: the wealthy can afford their own pensions) but also such expensive entitlements as disability insurance, Medicare and Medicaid among other entitlements Medicare is horrendously expensive, partly for reasons that have to do with the way health care is structured in the US. (Unlucky if you are one of the individuals who finds it impossible to get privately funded replacements, such as because of preexisting conditions.) It is just conceivable that you could eliminate these programs over time. After all, individuals also bear some of the cost. There is no way the masses would accept an abrupt removal of their benefits, though, so reductions in the cost to business would have to be a slow process..
With that out of the way, we can examine where the main federal taxes go.
- By far the biggest is the military. I would argue that these costs could be hugely cut back, though only with a big short-term hit to the economy. What is needed is a small standing army and air force, together with a minimal nuclear deterrent. There is no way the elites would permit this, however. Their ability to project power globally relies on the current bloated monster.
- You have federally funded education initiatives like the Head Start program, training and placement for unemployed, and grants for low income college students. Individually, these are not too expensive, but collectively they command a measurable proportion of the budget. I would personally not favor eliminating most of these, and I think acceptance of the system is impaired by doing so, but I concede eliminating them is possible.
- I believe food stamps are funded from regular taxes, not social security, so these need to be considered separately. Yes, they could be axed. Some children would die, and more would be mentally and physically damaged by malnutrition, but that is not the elites' problem.
- There is government support for scientific research. Outside of that with military applications, it is actually not a huge amount of money.
- There are regulatory authorities to ensure things like food safety and disease control. While business would probably like to see them go, as complying with regulations costs them money, I personally think for most purposes they need to stay.
- There is infrastructure spending, such as on the roads. You could replace this with a system of toll roads, as in Europe in centuries past.
- Veteran's benefits could be eliminated, but the outcry from the masses would make this quite untenable
Overall, I agree with the theory that much smaller and cheaper government is feasible. I do not think it can be done in practice unless (i) you can convince the population at large that programs to benefit the bulk of the population should be eliminated for the benefit of big business and the rich; and (ii) you can convince the elites that their global ambitions need to be forgone for the benefit of everyone else. I think you have a tough task ahead.