Health care companies have always wanted higher rates and sought big increases since they were first founded.. The reason is not that the new members are sicker than thy expected, it is GREED. What's worse is in the past if you got sick many companies would drop you like a hot potato. Oh they were very happy to take your money for 20 or 30 years but one heart attack and you were no longer "Insurable" according to them.
Thankfully the Affordable health care act changed all of that and the reports are in already.. Billions in savings... .
But you are right, Greedy insurance executives still want rate increases.