The phrase 'should not increase' is correct and usable in written English.
It is usually used to express that something should stay or remain at the same level and not increase any further. For example, "We should monitor the temperature to ensure it should not increase beyond a certain point."
Unionization absolutely should not increase the chances of a company's demise.
"Crossing a border should not increase costs and there is no technical reason to do so".
"This modification should not increase response time, but will help train police call takers," the agencies said.
However, model extraction and evaluation times should not increase, which demands for fast and still accurate substrate model extraction tools.
Third, the rate of floodwater discharge should not increase much above that experienced before the construction of the dam.
AARP, the influential lobby for the elderly, says Congress should not increase payments to providers without first ensuring that older Americans get prescription drug coverage.
The debt guidelines that my office is using to evaluate proposed debt issues state that refundings should not increase future costs.
It is now widely recognised that global temperatures should not increase more than two degrees Celsius as compared with pre-industrial levels.
Stopovers and flights to locations not related to the project (e.g. your home city, U.S. cities other than New York) should not increase the cost of your ticket.
Mr. Gruber, a professor at the Massachusetts Institute of Technology, remembers telling other policy makers that economic theory says they should not increase cigarette taxes.
Andrew George, a Lib Dem, suggests the government should introduce a bill saying benefits should not increase by more than average wage inflation.
