Actually the OP is just the type of person who can easily benefit from some "cheap" offshoring.
It doesn't sound like he makes tons of money, so for the sake of an example let's say he makes 100k a year. He could open an offshore account and get a visa/debit card like he suggested, and then use it for every day expenses and withdrawals, never pay any taxes on it (if he chose not to) and the IRS would never know about the $$$.
But that's about all you can do easily and inexpensively, and if you're making serious money the "get a debit card and use it for every day expenses" won't help you much.
So yeah this can work if you're making say $100k a year, but the real question is what to do when you're making 100k a month ... then shit gets real and it's not quite as easy (if you like to sleep at night).
until another country, financial institution or credit card rolls over and decides to funnel data to them.
and tax evasion is kinda big gamble. People on here got so worked up over the FTC going after berry slangers but you know what? You're not gonna go to jail for that.