Re: Basic Business B****cks
If you want to change the mind of such a higher-up, the only two strategies are to suggest their proposed course would be illegal, or to provide another option that is cheaper.
Be prepared to learn that "illegal" has may flavours and nuances:
a) Straight up illegal,
b) Probably illegal,
c) Illegal in some specific context,
Your Quest, should you chose to persuade the leadership, will be to move "what they want to do" from categories "a" or "b" and into "c". You cannot cop out by setting "some specific context" == "if found out".