Grant Wahl's Solution to PKs

In last week's Sports Illustrated, sidebars to the article about the NHL's switch to 3 v. 3 overtimes in an effort to avoid shootouts, made suggestions to improve other sports, including soccer.

Soccer writer Grant Wahl proposes removing a player every five minutes in overtime.  "Soccer games should be decided by soccer," Wahl writes.  He reasons that "soccer is a game about space: How to find it, how to use it, how to create it."  He goes on to say that his proposal would create more space and add interest because of the coaching decisions required.  And debates about these coaching moves would be soccer debates, which those about shootouts are not.

I greatly respect Wahl as a soccer journalist, but I think he's trying too hard here.  My problem with is proposal is it assumes someone will score once the teams are playing with less than the normal 10 field players.  But the more players who are removed, the more running those remaining on the field will have to do. And there are only so many miles in the legs of even the fittest professional players.

After 95 minutes it's 10 v. 10.  After 100 minutes, 9 v. 9.  At the 105 minute mark it becomes 8 v. 8, then at 110 7 v. 7.  At the end of 120 minutes, the normal amount of overtime, the teams would be down to four field players and a keeper.  Is Wahl suggesting that they keep going here?