That's disappointing. I too well exceed the mins and have the type. Lower time, non typed Sic new hires for a G4 flying straight up charter start around 105k first year in teb. Second year jumps to 120-130k upon review, then small increases until you make pic. Upgrading to pic is about 150k. I know quite a few captains who are at year three and four earning 180k - 200k in teb. Some came with G4 time, some came with other heavy or 121 time. That's pretty much the top for G4 charter at teb unless your on a 91 account.
WWJ could have come at you with an offer similar to that to make it more palatable. Start you off in the right seat for 6 months at a lower number. When they get know you and see your competent slide you over to the left seat and adjust your salary accordingly. I seriously hope they aren't getting asses in the seats with that bait and switch. It'll lower the bar for everyone.