The world-record points scorer kicked 14 points and created Paul Sackey's late try to clinch a vital win.
Star-studded Toulon were without a number of their big-name players but Wilkinson believes they were still able to field as strong a team as any against the Welsh region.
"A good strength to have at a club is the fact of being able to say there is no first team or reserve/second team," said Wilkinson.
"You want to have a team where everyone is capable and can play at the same level. If you have that then that is great.
"There are certain partnerships which tend to work, or you want to use certain combinations against certain opposition, but that's the joy of rugby.
"Everyone deserves their turn because all the players work hard for a place. There are players playing for their lives rather than just out there knowing that they will play next week and it is impossible to answer the question as to how strong the team against the Ospreys was.
"We train together every day and you do hate the fact that some players are not playing, or not playing as much, as others. That is one of the unfortunate side-effects but you need a big squad.
"It wasn't a weakened team out there but I'm encouraged that the players came in showed they deserve to play."