Marshall govt fails on 100 Day Plan: Labor

The South Australian opposition has accused the Marshall government of failing to deliver on 20 promises in its 100 Day Plan.

Labor's Government Accountability Spokesman Tom Koutsantonis said "all up, it's been a lethargic, lacklustre 100 days", pointing to a lack of action on issues such as deregulating shop trading hours.

"While struggling to keep up with his own plan, the premier has gone missing when problems have arisen, such as rock throwing and the release of notorious pedophile Colin Humphrys," he said on Tuesday.

"Labor has developed solutions to these problems and the Liberals have played catch up, ultimately adopting Labor's policies."

Labor said Mr Marshall has failed to establish a regional roads and infrastructure fund, establish an economic advisory council and issue a Ministerial Development Plan to zone the Repat site for health care services - all promised in the 100 Day Plan.