Increasing IQ is, at best, a side effect of increasing intelligence. That is, IQ is just one way of quantifying intelligence in a single number. Its limitations

Increasing IQ is, at best, a side effect of increasing intelligence. That is, IQ is just one way of quantifying intelligence in a single number. Its limitations are well known. Depending on how poor a mapping there is between intelligence and IQ for the specific individual, it is entirely possible that intelligence goes up while IQ stays the same (or conceivably even goes down).