As 
@Muffinpants said (wow that's quite the Handle), why would you pay for Genie+ if you think the rides that you prefer have short lines?  If that is the case, 
save the $$$ and just wait in line.
You can also buy an IAS for RotR without also getting Genie+.
Now, you can pay for meals, merchandise and make your kids happy by going on RotR.
In regards to feeling like a rich jerk...it's $15pp/day.  Tons of people will pay that.  Hell, people with financial problems buy DVC, APs, etc.  WDW is the land of over-extending yourself.  So, I don't think you will look like Cleopatra being carried through the queue to cut the peasants in line.