Inability to pay taxes is not tax evasion, of either of the recognized types in the US (evasion of assessment, i.e., concealment of facts that would indicate tax is due, or evasion of payment, i.e., concealment of or movement out of reach of taxing authorities of funds with which taxes that are due could be paid.)
In practice that's bullshit and you know it. The .gov, be it state local or fed, has show time and time again that it's not above prosecuting someone for a "failure to X" crime of which the failure was caused by the .gov's own action.
Presumably, the US government still accepts payment of taxes in cash, so that cash-based businesses that can't get a bank account can still pay. Perhaps the situation could arise in other countries though.
Your link only pertains to one way the IRS takes cash payments. They also take cash payments at Taxpayer Assistance Centers (TACs). You don't have to pay cash at a private corporation, you can go into an IRS office and pay cash.
