Andrew Doba, spokesperson for Gov. Dannel Malloy, sent the following statement in response to Sen. Joe Markley's call in this post:

“Information relating to state vendors has always been publicly available under our freedom of information laws. The names, addresses and payment information relating to state vendors, such as personal care attendants, cannot be withheld. In fact, every year the Yankee Institute requests it, and republishes it on an online database.
“Is the Senator recommending that we keep secret how the state spends taxpayer money?”

As background, Doba offers the following link:
http://www.ctsunlight.org/CheckstoBusinessesPeople/tabid/57/Default.aspx