Companies don't pay those taxes, consumers do. On top of that, every state in the union that has a sales tax also has an accompanying use tax. If you purchase something out of state, and have it shipped to you for your use/consumption in your state/locality, and the seller doesn't collect sales tax on it (no brick and mortar presence in your location/state), the law in those states with use taxes says the consumer is responsible for tracking and paying use taxes on those items. If the state wanted to get nasty, it could attempt to get sales records from the big online retailers, and go after the individuals for use taxes due.
You’re not entirely correct. You veered off when you said:
“Companies don’t pay taxes”.
In fact they do. Whether they include it in the advertised price or ring up the tax afterwards it’s all semantics.
Yes, the consumer in the end pays for it along with paying for the cost of manufacturing, cost of advertising and most of manufacturing and for some items, cost of support.