"moral disadvantage" is correct and can be used in written English.
For example, "The government's policies have put the poor at a moral disadvantage."
To be rich like Wharton may be what all of us secretly or not so secretly want, but privilege like hers isn't easy to like; it puts her at a moral disadvantage.
Professional humorists get a lot of credit, especially at election time, but, at the end of the day, we're still mere spectators, at a fundamental moral disadvantage from those we ridicule.
Similarly, to identify a possible disadvantage or a moral concern about the recommendations is not to justify their rejection.
The moral and practical advantages and disadvantages of the options would then be discussed.
All see the pledge proposed by Mr. Lazio -- to ban use of soft money, largely unregulated donations, for radio and television ads -- as a way of putting Mrs. Clinton at a financial disadvantage while staking out the moral high ground.
Nonetheless, there has been in recent years a growing consensus to the effect that an ethical theory committed to an impoverished or inaccurate conception of moral psychology is at a serious competitive disadvantage.
Additionally, it was quite possible that, one day, the hacks could disadvantage his fellow Republicans, and moral high ground would be useful if that day arrived.
In chapter 5 of the Descent of Man, Darwin argued that the distinctive features of human sociality resulted from selection among groups with different standards of morality conforming to the local moral system does not lead to individual disadvantage, but tribes with more effective moral systems would replace those with less effective systems.
He writes, "The motivating idea [for the anticaste principle] is that without good reason, social and legal structures should not turn differences that are both highly visible and irrelevant from the moral point of view into systematic social disadvantages.
There must be social processes at work that, as Sunstein puts its, "turn differences that are both highly visible and irrelevant from the moral point of view into systematic social disadvantages" (1994: 2429).
Holmes said: "This unfair policy is trapping disabled people in a cycle of disadvantage, and British air carriers have the moral responsibility to stop applying it to disabled customers' mobility equipment, as it's clearly unfit for purpose".
