The result of the last meso exploit (RIP lMira)

Because there's a chance that buyers don't get bundles and if that's the case there's a chance that you can save meso by avoiding taxes?
Of course, maybe it doesn't happen often but the intention is still there, so yes they are deliberately trying to avoid taxes.

But there is no difference in tax rates between 4,999 and 5,000 mesos.