Rent control is the canonical populist price control. That one's evergreen. Egg-prices-by-fiat are just a fad!

I think that opaque pricing is bad in that it creates a feeling of helplessness in the customer, is annoying and after every deal it makes you feel like you have been ripped off. Like the - call us to get a quote on some sites instead of direct pricing.

To a lesser extent it is the same with loyalty programs - my grocery stores often discount items to 50% and on my receipt it there is usually something like - you saved 20 Euro - which could be 20 to 30% of the bill. A lesser mind than the average consumer's may suspect that they keep all the prices permanently inflated by 20 to 30% and if some schmuck dare to buy their favorite cheese when not discounted - it is on them.

This is the answer.