“everything would be fixed and we wouldn't have any environmental problems.”
Ah…age-old gaslight tactic. Using words like “everything” “all” “any” to encapsulate your opponents argument then using a non-sequitor counter-point (leaded gasoline) to argue a tangent point (a point not relating to interest rates).
"How would you deal with externalities such as cars polluting the air with lead?" is a perfectly valid question in response to the claim that "meddling" by governments into the free market is inherently bad. It's neither a non sequitur nor gaslighting.
