'extravagant expense' is correct and usable in written English.
You can use it to refer to a large, often unnecessary sum of money that is spent for something. For example: "John made an extravagant expense on the trip to Paris, spending almost double the budget."
"It's not an extravagant expense," she said.
More damaging to his role as Vatican finance supremo, fictions were put about that he was submitting extravagant expense claims.
The vote was a victory for President Obama and the defense secretary, Robert M. Gates, who had called the engine "an unnecessary and extravagant expense".
Should the national team be eliminated early, Mr Torturra reckons, more Brazilians are bound to question the extravagant expense, which the government puts at 25.8 billion reais ($11.5 billion), spending that has not yielded the promised public infrastructure.
The 1897 elegant Bradley-Martin Ball marked the height of over-the-top extravagance, all but drove the hosts out of the country and posed a question raised by Susan Gail Johnson in an accompanying essay: "Could the wealthy justify extravagant expense on entertainments by claiming that they were putting their money into circulation?
Nine months after the House of Commons was plunged into crisis by news accounts of extravagant expense claims by hundreds of lawmakers, the official appointed to audit the claims ordered 390 members of Parliament on Thursday to repay $1.8 million -- about $60,000 less than the cost of the review.
He said his extravagant expenses were work-related.
Meanwhile, implementing or supporting tough discipline for the most extravagant expenses artists might indeed lead to awkwardness and perhaps the odd by-election.
The book details the extravagant expenses of Senator Saxby Chambliss, Republican of Georgia, for instance, whose leadership PAC spent $10,000 on golf at Pebble Beach, nearly $27,000 at Ruth's Chris Steakhouse, and $107,752 at the exclusive Breakers resort in Palm Beach, Fla.
Another southern Socialist, Robert Navarro, faces accusations that he spent tens of thousands of euros of party money on pizzas, among other extravagant expenses, charges he calls "lies".Mr Sarkozy's UMP party also faces inquiries.
But he did not appear to endorse calls by Labour activists for local Labour parties to be allowed to deselect MPs who had made extravagant expenses claims that were within the rules laid down by parliament.
