> There are quite a few people who take cash and yet do not report it as income. However, in the case you are describing a business would have to sell something illegally (without reporting their sales to the IRS). In my mind controlling businesses is far less burden on the IRS than individuals (how many returns are audited again? less than 1%?).
You can easily do the same thing. Just take the cash from selling stuff and don't report it as income. Hell, you could report it as a loss at that, and maybe even get some benefit from that. There's still ways around it, and they will be found by those who have the money to find them.
> Not only that, if that money is then used to purchase legitimate goods the tax is still received.
But it's not. The tax on what the new person bought is, but not on the original purchase. The tax of the original purchase still isn't received.
Either way, it hurts honest people and the poor, who likely don't have the connections or money to get around paying taxes; not to mention it's a much higher percentage of their income that's being taxed, so it doubly impacts them if it's sales-tax only.