legality/fairness of higher real estate taxes for investor owned

[Jocelyn Canfield]

My son recently moved to South Carolina and I was looking to buy a long term rental property in his area but discovered that the real estate property tax is TRIPLE for non owner-occupied homes. How is this even legal?? This ultimately hurts people who rent as a landlord would pass these costs onto tenants. It seems like price discrimination to me. Robinson-Patman doesn't really apply. Curious of other states who likewise force landlords to pay a higher burden.