Does it matter how ministries are merged? You could merge all ministries into one and just call it the Government. There will still be people performing the functions for special roles.
Even the PAP believes that ...that's why there are so many ministers in the PMO. There's a PMO minister in charge of municipal affairs, there is one in charge of labour, there is one in charge of propaganda, there is one that does nothing until ordered to.
We have a minister of foreign affairs cum law cum municipal affairs.
So, are you going to mock the PAP?