Remeber most innovation is brought on due cost ...
I assume you mean "cost constraints."
Is that really true, in general?
It sounds like the kind of white lie one tells disgruntled subordinates.
For example, one might argue that the F35-B program itself is an unnecessary extravagance that US air power doesn't need, and that aircraft carriers of any sort should not be Britain's top military priority.
However, others here will reply that I am all wrong and that new STOVL fighter planes on new aircraft carriers are splendid innovations that the UK needs.
I suppose it all depends on who where one's paycheck comes from.