ecash/federations don't scale Bitcoin. They scale IOUs. And ironically their inflation is arbitrary and centralized. A mint can print as many tokens as it wants that aren't backed by Bitcoin.
Ohh my. Have Fun Playing with shitcoins. Godspeed.
Your criticisms are that shitcoins are bad because inflation, then say we don't need them because we have these custodial IOUs we can use that mints can arbitrarily and covertly inflate. Makes no sense.