Don't see how you can force anyone to move up imo, unless the others are willing to pay for any losses that club has.
Riders wages seem to be the biggest issue here. Sure i heard somewhere that Chris Harris would be on double what he is on in the championship. So no wonder why Glasgow don't want to move up! Just because their owners have a lot of money doesn't mean they want to lose some of it on a league that looks like it is crumbling.
If they need a championship team to move up then they need to compromise on some of the deal breakers, if that is even possible.