Apparently the standard take is that Harper and Boras are jerks and Bryce's asking price is ridiculous because he isn't worth it.
Here is my take, which is by no way unique. Figuring out what WAR per dollar Harper will be worth doesn't include the entire picture of his brand and his marketability. While his asking price is steep, this soft luxury tax which was designed to be a "George Steinbrenner III" cap, has become an excuse for owners to make more money, charge more, and basically pay players below inflation. Now it's not the fans fault that the players union signed a bad CBA for them, but it's unfathomable that teams won't pay for one of the 15 best position players in the sport. Baseball teams are being run more and more like greedy corporations than sports teams to give fans something to watch as an escape from their everyday lives. Harper almost has to ask for 300 Million plus because if he doesn't, he screws future free agents. Same reason why Yasmani Grandal settled for one year at a high salary, as all the multi year offers didn't move the needle forward for future catchers.
All in all, the free agency system is broken. Basically every team can get better with the addition of Harper's bat. Seeing that he is forced into the current situation where the high offer is a team that he seemingly has reservations about joining, the player has no leverage in a situation where they should.
I don't think the Nats should spend on Harper, but considering the big offer is only coming from the Phillies is troubling. A team that just traded away some of it's best prospects and young talent to "make a go of it now" with at best a wildcard roster is not necessarily a good fit for any potential free agent. I know that Werth turned heads by signing in DC, but he signed with a team that had two of the highest ranked prospects/young talent, and an established star 3B. If I was weighing which teams in the NL East I'd want to join, I'd say the Braves outlook is much better, the Nats still have a hell of a roster, and the Mets rotation is nothing to scoff at.