Buying a team for a drive makes complaining about pay drivers seem a bit churlish, no?
It'll be nice to see what FI can do with a proper budget behind them rather than being interrupted and delayed through poor financing as it has been over the last years. With Renault and Haas improving race by race solid investment is exactly what they (and we) want to keep that midfield fight as close as possible. It'll also help sort out whether STR has real talent or not once he is in a good car.
Contrary to some of the opinions upthread I think the 2nd seat there would be a plum drive. If STR is as weak as many of us think he is then it shouldn't be too hard to beat him over the season. If say, PER stays, who thinks STR could beat him in the same car? It'll likely be a repeat of LEC showing that the car is better than ERI makes it look, no? That certainly hasn't hurt LEC this year.
It might even turn out to be a blessing in disguise for Williams. I doubt they could refuse the money if STR wanted to renew and, e.g. getting Merc money and George Russell in the seat might well turn out to be a better move.