And it's not like that $600B will be pulled out of circulation; it'll be used to fund things that generate economic activity, or even used to pay down debt, and those creditors can put that money back into the economy.
But if you've dealt with tax agencies beyond being a plain employee, they can often be just plain wrong, and you have to go through a lot of time, money and effort to prove that they are wrong, with them potentially just confiscating your bank account until proven wrong. Or your accountant / payroll provider has screwed up and now you have to go through a lot of bullshit to fix that problem, because YOU are ultimately on the hook.
More cops on the road doesn't necessarily mean more 'crime' is solved, it also means there is more cases of police brutality. If you're a small business, you don't have nearly as much strength to defend yourself. The large and rich will always have that ability, as it has been shown for 1000s of years of human history.
If a society 'arrests' every perceived jaywalker (whether or not they were jaywalking), and then pressured into a guilty plea deal because fighting it is worse than the price of the plea deal, is that really good for society? This is what I meant by the double edged sword of increased budgets for tax agencies.
(Note that this is specifically about income taxes, not payroll taxes that fund entitlement programs)
You could also just start injecting more money at the bottom via a UBI designed to constantly grow to chase inflation, and watch the real purchasing value of the 1%’s piles of dollars start to decline precipitously as the dollar entered a hyperinflation spiral, but that would mean international trade would drop dollars for another currency that was more stable.
What I was more talking about is the negative effects of spurious enforcement, much like how more cops means more police brutality, especially for the weak. This plays out more in small business.
In many cases this is perfectly legal, and many companies do just that (not directly with toothbrushes, but pay licence fees to offshore companies where taxes are low).
For another example, in slovenia, i can start a company, earn 100k (profit), and that profit gets taxed at 19% at the end of the year, and to take it out (pay it to me, the owner) aditional 25%. If I open the same company in bosnia, I can still to the same jobs with the bosnian company, but I only pay 10% on the money I take out (so, 100k->81k in slovenia, and to pay out, i get 60.75k... or i get 90k with a bosnian firm).
This is completely legal in slovenia in bosnia. Our "IRS" can't do anything about that.
So, first the laws have to change to make it fair, so facebook would pay taxes at the same rate a small local plumber would, and only than can IRS start their job.
Also, your toothbrush example is actually illegal and considered a tax evasion by EU and probably most Western countries.
Taxes are way more complicated than you're trying to show. Also, don't underestimate the IRS.