The difference lies in how resources are used. Honest and aboveboard methods are permissible, but not underhanded ones. Using public power to pursue private interests is wrong, but buying private power with private interests is all right. Using public power to build up public interests is all right, but trading on public power for private interests is theft.
但是用資源的方法就不同了，見得了人的方法是可以的，見不得人的是不可以的；拿公權買私利是不可以的，拿私利買私權可以；拿公權建立起公利是可以，拿公權換私利則是偷竊。