That's ridiculous, again.
First, concrete structure visible isn't "modern design" while led cladding is "classic". It's the other way around. That's why so many idiots go to the Bucharest stadium thread and say it looks "communist" to them.
Second, a stadium is a "necessity" only when other, more pressing issues, such as hospitals, schools, transport infrastructure or housing have been dealt with. Thirdly, even when it's a real necessity, public money shouldn't be thrown without any constraint. Every decision has to be thought in terms of cost efficiency and respecting the proposed budget. Public investment also needs amortization, not just private investments. The big difference is that public investments can afford to wait much, much longer for amortization.
The only thing you say and I agree with is that many other stadiums, especially in Eastern Europe, have a final cost much higher than the initial cost. But that doesn't make it OK. People from Kyiv, Warsaw etc. are also upset because the governments have wasted a lot of money.
Finally, how is the case of the Lille stadium the same as for Bucharest? The Lille stadium wasn't supposed to cost an amount which then almost doubled, like in Bucharest. On the contrary, the Lille stadium was supposed to cost (for the public finances) 613M euro and it ended up costing 324M euro instead. That's how I like governments to treat public funds (the people's money). When there are hard times, it is better to save and to be very careful when spending.
If I am Romanian, don't expect me to accept that bad is good and black is white. I like the Bucharest stadium and I am happy it was built even in the way it was built, but I just don't think it's a good example to give in terms of cost efficiency (or design).
Is really hard to give in this days such examples, becouse the same thing is happened with all new stadiums in Europe including this one from Lille. That's why your intervention was without a reason. You can find incompetence and coruption in every country when we are talking about big money, so the France is not an exception. But you, as a romanian patriot just throw away bad words... Just tipical...

hno:
Maybe is time to explain what good business means to you when we are talking about stadiums... In first place, an national stadium is a necesity and not a business. The National Arena is not an art stadium but is a stadium with a modern design, not a classic one like the stadium from Lille... Maybe you get the point now...