Because banning them is more contrary than making them pay their "fair share". You have passing the law, exceptions from the wealthy and/or powerful, and then

Because banning them is more contrary than making them pay their "fair share". You have passing the law, exceptions from the wealthy and/or powerful, and then you have enforcement (for the wealthy and powerful). But the article perhaps doesn't go far enough; Tax private flights to pay their "fair share" of airport and ATC costs; and then guilt all of the businesses into also being "carbon offset" (like the major carriers)