All taxes are a slippery slope. Name one that has ever been repealed. Income tax in the U.S. started out as a modest 3% on only the highest incomes and look where that has ended up: full on wealth redistribution.
We can argue whether that's a good thing or not, but not whether there's a slippery slope when it comes to implementing a new tax.
We can argue whether that's a good thing or not, but not whether there's a slippery slope when it comes to implementing a new tax.