The MP for Bradford West has called into question the use of public money for the funeral, which is taking place on Wednesday.
Speaking on the BBC's 'Daily Politics' show today, Galloway said: "The Thatcherite mentality would dictate that the funeral should be sponsored, Burger King can stick their logo on the hearse and pay for the whole thing.
"I don’t want the public to be forced to pay for something that is a private and political party affair."
Yesterday, on a podcast, Galloway had suggested that Coca-Cola and McDonald's could also contribute.
Downing Street has so far refused to say how much the service will cost, although Cabinet Office minister Francis Maude has described the reported figure of £10m as "fantasy".