Biarritz star Betsen has raised the stakes for the March 7th clash at the Millennium Stadium following the announcement of the France squad for the game.
France have made just one change to the twenty-two that beat Italy 25-0 in Paris with outside half Frederic Michalak returning from a shoulder injury in place of Julien Peyrelongue.
Betsen insists France will not be taking Wales lightly, despite their slump in Dublin, as they set their sights on a Championship decider with England in the final week.
"We need to win in order to remain unbeaten to set up an RBS Six Nations final against England on the final weekend," said Betsen. "We are going to have to take Wales very seriously. They showed they have a lot of strengths during the Rugby World Cup, I was pleasantly surprised and impressed by them in their games against New Zealand and England.
"Their outside half, Stephen Jones stood out, as did Jonathan Thomas at No.6, certainly a player of the future.
"Despite the disappointment of last week's game against Ireland, Wales are going to want to prove how good they are next week. Two years ago, when we were going for the Grand Slam, it was very difficult to get a win at the Millennium Stadium. It's always very difficult to win there. This match is going to be key.
"We need to show a lot more commitment than we have done so far in this RBS Six Nations. We have been lacklustre and our commitment has not been exemplary, particularly against Italy.
"It is more important that we improve our attitude and commitment against Wales than it is to get a win. If we have a positive attitude and are committed, we can hope for a result, if not, it will be difficult to win anyway.
"Our physical commitment against Italy was disappointing but I think you have to put it down to a number of factors such as fatigue and having to adjust to a different rhythm every week with the various competitions we are all involved in.
"We also have to ask some serious questions of ourselves and come up with something better against Wales next week. After all, if you don't respect each other and your opposition, you shouldn't be playing rugby."