The letters to the Secretary of State for Work and Pensions and the Cabinet Secretary for Communities, Social Security and Equalities follow the historic joint meetings of the two committees where they investigated how the devolution of social security was to be delivered.
The Committees heard that not only was it vital that both governments had a clear plan for the transfer of powers but that the procedures for addressing any dispute between the two governments had to be strengthened.
Sandra White MSP, Convener of the Social Security Committee, said:
"With an issue as important and complex as the transfer of social security powers, close working between the Scottish and UK Governments will be vital. There is clearly some great work taking place between officials and whilst there will always be political differences between the two governments, these cannot be at the expense of claimants. This is why we have today asked both governments to ensure they have a clear plan for how the transfer will done successfully."
Pete Wishart MP, Chair of the Scottish Affairs Committee, said:
"Our session with Damian Green and Angela Constance showed that, while new powers are being devolved to Holyrood, the success of this devolution of powers in Scotland will rely on a good working relationship between ministers and departments. Where there are inevitable tensions over different approaches attached to the delivery of social security policy good working arrangements have developed amongst civil servants.
It is clear that there have been sticking points, most notably the lack of communications over Jobcentre plus closures, housing benefit to 18–21 year olds and differences in opinion over the fundamental purpose of the benefits system. We have asked the ministers to be clearer about how they work together, in particular how they will solve further policy differences, and we look forward to their response."
The Social Security Committee and the Scottish Affairs Committee held two joint meetings in March 2017. At the first meeting, the Committees heard from officials from the Scottish Government and the Department for Work and Pensions about how work to progress the transfer the social security powers was being done at official level.
The second meeting of the Committees took place at Westminster and where the Secretary of State for Work and Pensions, Damian Green MP and the Cabinet Secretary for Communities, Social Security and Equalities, Angela Constance MSP.
More information about the joint work can be found on the Scottish Parliament website.