The IRS's is one of the last government departments that a rational person would cut because IRS Agents earn their keep by nailing tax cheats.
Or you'd simplify the tax code, which would make it easier to spot them, and which would lead to less mistakes which means less fraud and less errors. Then you wouldn't need so many tax collectors.
That's virtually impossible to do under our system. It's incredibly complex, with a whole panoply of veto points, and it's specifically designed so that the same individual can never have control of all of those veto points.
Which means if you're taking a tax break away from somebody who uses it, they have a dozen or so places to stop you.
OTOH, why is the Canadian prime Minister Prime Minister? Because he has the Confidence of Parliament. What does that mean we he tells the Chair of some damn finance subcommittee to pass a bill? It means the Chair of the subcommittee has three options: resigning from the subcommittee, new elections, and passing the damn bill.
If your sole objective is freedom-protection you don't create a Federal government.
Wait, what? If your goal is to give states freedom to oppress people, that's true. Otherwise, false.
Don't be silly.
If your sole objective is freedom protection you're an anarchist, and instead of creating a new level of potential oppressors you abolish all levels of potential oppressors.
Even if you weren't full anarchist, the states of the 1790s were a lot easier to dodge then the Feds because you could always move. Moreover state-level elections back then tended to be annual, so they tended to be much closer to the Electorate then the Feds.
Founders were actually trying to do something very, very complex: create a government that restricted freedom enough
The founders were trying to maintain a status quo in which they and their ilk would control society. They suceeded. They were wealthy, racially privileged land owners, just like in Athens. And guess what? Wealthy, racially privileged land owners still run the country, so mission accomplished.
Don't be ridiculous.
Buffet, Soros, and the Koch brothers don't own land. They own stock. What we have today's completely different, and much more Democratic, then a landed aristocracy; because it just is.