I don't like this idea in so many ways.
First of all, the Chargers have a much better team, both offensively and defensively, than we do. Rivers almost certainly wouldn't be as successful here as in San Diego.
Second, the guy is 33 years old. How much longer is he really going to play at a high level? Someone pointed to Brady's longevity, but that's like saying that because Darrell Green played 'til he was 42 Hall can do the same. Poor argument. Of course, that was also the same guy that said Blanda retired at 65.
Third, there's the salary/contract issue. He has one year left on his current contract. Once that expires, are you really going to want to pay a declining 34 year old QB the kind of insane salaries QBs make these days? If he'd accept, you could sign him to more of an easily escapable year-to-year deal, but even then, what if he flops after a year or two? Then you're basically missing out on the best crop of edge rushers to come out in some time in exchange for a few years worth of good QB play that almost certainly won't get you to the playoffs anyway. Potentially elite pass rusher for the next 10 years or a QB who you may or may not get a few good years out of? Easy choice. Lotus mentioned a "renegotiate-and-trade", but what kind of salary is Rivers going to take if he knows he's coming to Washington? ( Also
this.)
Finally, I though Scot was here to build up the team the "right way", through the draft. Then he trades the #5 overall pick for a declining 33 year old QB? Wat.