The only time I have seen cost of 700+ the leader has had the finish research perk.
Am not arguing that the cost maybe too high just how they were generated.
For me they should all be 15+ on the ability line 100% approval not lose approval when hired and cost -250 BC
On the other hand the AIs should all be negative in ability 0% approval and 10,000+ BC
But I just explore and expand, wish games would work without even having AI but if wishes were wings Frogboy wouldn't bump his fourth point of contact when he jumped.