As states move to hide details of government deals with Wall Street and as politicians come up with new arguments to defend secrecy, it was revealed this week that many government information officers block specific journalists they don't like from accessing information. The news comes as 47 federal inspectors general sent a letter to lawmakers criticizing "serious limitations on access to records" that they say have "impeded" their oversight work.

The data about public information officers was compiled over the past few years by Kennesaw State University professor Carolyn Carlson. Her surveys found that 4 in 10 public information officers say "there are specific reporters they will not allow their staff to talk to due to problems with their stories in the past."

“That horrified us that so many would do that,” Carlson told the Columbia Journalism Review, which reported on her presentation at this week's conference of the Association for Education in Journalism and Mass Communication.

Carlson has conducted surveys of journalists and public information officers since 2012. In her most recent survey of 445 working journalists, four out of five reported that "their interviews must be approved" by government information officers, and "more than half of the reporters said they had actually been prohibited from interviewing [government] employees at least some of the time by public information officers."

In recent years, there have been signs that the federal government is reducing the flow of public information. Reason Magazine has reported a 114 percent increase in Freedom of Information Act (FOIA) rejections by the Drug Enforcement Agency since President Obama took office. The National Security Agency has also issued blanket rejections of FOIA requests about its metadata program. And the Associated Press reported earlier this year that in 2013 "the government cited national security to withhold information a record 8,496 times — a 57 percent increase over a year earlier and more than double Obama's first year."

Those revelations foreshadowed this week's letter from more than half of the federal government's inspectors general saying that government agencies' move to hide information from them represents a "potentially serious challenge to the authority of every Inspector General and our ability to conduct our work thoroughly, independently, and in a timely manner."

In that letter, the inspectors general say that agencies are saying information is "privileged" and therefore must be kept secret. That is one of many increasingly creative rationales that public officials are now citing as reason to keep government information secret.

In Chicago, for example, IBTimes this week reported that officials in Mayor Rahm Emanuel's administration rejected a request for documents about a secret $1.7 billion fund that is often used for corporate subsidies, some of which have flowed to the mayor's political donors. In a letter explaining the rejection, the officials said it would take too much staff time to compile the data and that therefore the request was "unduly burdensome."

Likewise in Rhode Island, IBTimes recently reported, State Treasurer Gina Raimondo (D) rejected a newspaper request for information about the state's hedge fund contracts on the grounds that she wanted fund managers to "keep this information confidential to help preserve the productivity of their staff and to minimize attention around their own compensation." That rejection was one of many similar rejections from states seeking to keep the details of their Wall Street deals secret.

Carlson's data from 2014 shows that three-quarters of journalists surveyed now agree with the statement that "the public is not getting the information it needs because of barriers agencies are imposing on journalists’ reporting practices."

Yet, despite that lament, the government's efforts to keep information secret may be having its intended effect on the psychology of journalists.

An Indiana University study published earlier this year found that “the percentage of U.S. journalists endorsing the occasional use of ‘confidential business or government documents without authorization' [has] dropped significantly" in the last few years. In all, the IU survey found only 58 percent of journalists support using such documents in their reporting.