Okay see the problem with this is that it's a mathematically logical leap to assume that in the time that a person is allowed to create X unique ideas for himself, he can also make X^X ideas derived from one other person's X ideas, or the same amount of ideas as he could make in his lifetime per idea of this other person.
To show you how ridiculous this number is, let's say that people can achieve 100 unique ideas in their lifetime. By your proof, that same person should therefore be able to create 100^100 derivative ideas. That's 1x10^200 or 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,00,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 ideas from that one person.
That is an utterly incomprehensible number.