"decent purposes" is correct and usable in written English.
You can use it when you are discussing goals, intentions, or reasons that are morally good and proper. For example, "The charity was created with the intention of serving decent purposes and helping the local community."
In Parliament yesterday, the Financial Secretary to the Treasury Mel Stride, who was speaking in place of the Chancellor for some reason, insisted that the government believes in "a fair tax system where everyone plays by the rules", and that in this context "there are many good reasons why, for perfectly honest and decent purposes", individuals may choose to put their money in offshore trusts.
"In the age of social media, where divisiveness serves no decent purpose, these flippant comments on my part only made things worse and contributed to a cycle of rage that I should not have inflamed further.
In this aspect of the debate there seems a total inability to distinguish between futile episodes within the war and the decent purpose for which the war was being fought.
A good old-style blockbuster, handsomely presented, vaguely serious, its popularity derived largely from the presence of many Caravaggios, although its lasting value and most decent purpose was to impress on the public the diverse gifts of less well-known painters like Carlo Saraceni, Paul Bril and Giovanni Lanfranco.
Villa, now right to left in the second half, have come out with decent purpose.
Together we must learn how to compose differences, not with arms, but with intellect and decent purpose".
Well, what do you call wasting $33 billion on a hopeless, immoral, illegal war that a majority of Americans oppose, and denying those same dollars to job creation or any other decent purpose?
"All these war-weary peoples shared too this concrete, decent purpose: to guard vigilantly against the domination ever again of any part of the world by a single, unbridled aggressive power".
The gorgeous, squat Cinderellas and cheese pumpkins, favored in Europe, are gaining popularity in the United States and are decent all-purpose pumpkins, for cooking and for garnishing a sideboard.
Decent all-purpose machines, but they're not particularly sleek or portable, nor will they excel at HD or gaming.
McVeigh says that despite SoonR's focus on the mobile access of files, 60 to 80% of usage is still through the PC browser, suggesting that it serves as a decent all-purpose backup solution as well.
