Up until a few years ago your name wasn't published until/unless you had paid.
This meant that if you stonewalled the auditor and made it take years to quantify the tax, and then refused to agree the penalty, and then acted the maggot about paying the tax (by not having anything accessible for Revenue to attach the debt), then you could either avoid publication for a good few years, or indefinitely.
Meanwhile the other sinners who played ball, and paid up, got named and shamed...
Also, if you look at the list, some of the companies are in receivership or liquidation, so the money may never be collectible - should that mean that they don't get published?
Hardly fair was it? Didn't exactly encourage cooperation with the process.