Canada had very high taxes covering everything from income to sales and yet our debt is ballooning at the federal and provincial level.

Its like saying that uncle bob has a ton of credit card debt because he doesn’t make enough money and not because he spends too much.

Disclaimer: lay person, not American or Canadian.

Whilst I understand your point in isolation, I don't understand how it refutes GP.

AFAIK, the current US administration has cut spending on most things (the military and ICE being notable exceptions).

As such, the suggestion that the ballooning debt is due to tax cuts seems perfectly valid.