The existing service needs to be upgraded, a hook into is only a very small fraction of the cost. I gave a real world example above about the water supply infrastructure that I ended up subsidizing developers for.
No, I am advocating that new developments cannot leach off of existing ones. They need to supply their complete infrastructure.
Developers put in their own services. Communities can use permit fees to offset the cost of increased infrastructure.
If you want to take that stance, pay up because someone else subsidized you when you bought a home.
It's like people who say they shouldn't have to pay school taxes because they don't have kids. They can show me the receipts that show they paid for their own primary and secondary education and maybe then I will listen to them.