I've seen Demi Moore The Joneses and other than a wealthy suburb of Atlanta and the last name, the movies are not similar. The Joneses is a good movie, watched it again a few months ago.
*** From Wikipedia: "Keeping up with the Joneses is an idiom in many parts of the English-speaking world referring to the comparison to one's neighbor as a benchmark for social class or the accumulation of material goods. To fail to "keep up with the Joneses" is perceived as demonstrating socio-economic or cultural inferiority." - See also: The Joneses. ***
i think it can also be a joke or a poke to this other movie : Mr. & Mrs. Jones (2001). Because the couple is also the "jone..s.s" (funny speaking ways) and they are agents too.