"exorbitant increase" is correct and usable in written English.
You could use it when referring to an increase that is too high or unreasonable. For example: "The exorbitant increase in housing prices has made it difficult for people to find affordable homes."
Adding insult to injury, the CQC plans to introduce an exorbitant increase in fees that will cost GPs £40m a year, threatening the future of small GP practices and potentially undermining patient care.
Instead, the group advocates increasing the amount of land to be bought for reservoirs.Not surprisingly, Florida's powerful construction-and-land-development lobby argues that the proposed land purchase is too large, and that the cost of the project will require an exorbitant increase in property taxes.
Though the first community that Tribewanted started in Fiji in 2006 is no longer under the organization's auspices, after an exorbitant increase in its land lease, its creation drew some 1,500 visitors and led to "Paradise or Bust," a five-part series that aired on the BBC in 2008.
Presidential candidate and former Secretary of State Hillary Clinton, among others, said in September that the exorbitant increase to the cost of Daraprim amounted to "price-gouging".
There was an exorbitant increase in the numbers of acellular capillaries in TGR retinas starting at two months of age.
But Mr. Kessel said that "exorbitant increases" in fuel costs necessitated action.
Ms. Sebelius, a former Kansas insurance commissioner, said that shining a spotlight on rates would discourage exorbitant increases.
Administration officials then stepped in to halt any effort to ban pharmacy-made versions, citing the need to check an exorbitant price increase from a drug company that suddenly found itself with a monopoly, an increase that could burden women who needed the drug.
She illustrated her City Life's "sword and shield" strategy by telling the story of a tenant who, after receiving notice of an exorbitant rent increase, worked with the organization's legal team to negotiate better terms not only for herself but also for her neighbors.
Activists have long asserted the exorbitant rates increase inmate isolation and unfairly punish families; calls out from prisons were known to sometimes cost inmates more than $1 per minute.
