Mr Thomas said that one possibility would be integrating local post office services with existing shops and pubs in rural areas.
This has resulted in a long-term drop in traditional mail volumes, particularly letters, and declining demand for conventional post office services.
Where there is a change, 9.5% would have access to post office services within one mile by road distance to the nearest alternative branch.
"People will be forced to fit around a timetable for accessing Post Office services, " said Nick Bourne, AM for mid and west Wales and leader of the Welsh Conservatives.
In addition to its traditional services of letter and parcel delivery, the Post Office now provides services such as e-commerce fulfilment, billing and customer management, logistics and warehousing.
In addition, official departments like Water Services and the Post Office could be privatized too.
Post Office Ltd said the relocation of services to the WH Smith shops would "safeguard and enhance" services.
"We have carried out extensive research into the current account market and the findings tell us that customers want simplicity, transparency and good value for money, " said Nick Kennett, director of financial services at the Post Office.
Last summer, watchdog Consumer Focus suggested that four million customers of High Street banks used the Post Office network to use some current account services.
And the Post Office undoubtedly has a talent for selling financial services.
The act also established the Central Intelligence Agency (CIA), which grew out of World War II era Office of Strategic Services and small post-war intelligence organizations.
The bank has 44 branches in Northern Ireland and runs a financial services joint venture with the UK Post Office.
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There are practical things to consider, such as checking it is not a duplicate and will it be easy for the emergency services, a taxi firm, or the post office to find it?
Residents of a Sheffield suburb are to open their own full-time post office after facing a walk of more than a mile to access services for the past year.
Chiefs at Postwatch Wales, the consumer watchdog for postal services, have already expressed their worry about the future of the Post Office.
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"This contract means the public and businesses will continue to have convenient, local access to essential services while sub-postmasters will retain income to allow them to continue to provide a Post Office service to their communities, " said the federation's general secretary, George Thomson.
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