I call bullshit on this one. In Germany all 3 major providers offer LTE (O2, though, only since ~2-3 years), and still the most common cap are 3-4 GB, some discounter/business tariffs excepted. Telekom and Vodafone offer a high quality network but high pricing at both and outright scammy sales practices at Vodafone makes me say "no thanks". O2s network is rotten, and it regularly breaks dowm when it's congested (bei it due to political rallies or soccer games) but at least they're cheap and improving.

Competition does obviously not work, and Germany is still stuck with slow internet over copper wires and universally shitty mobile providers as a result.