Isn’t that what sale is with it being sporadic? Retail price is for people who can’t wait for sales and need it now.
Not sure how retail price would be used. Permanent price drops are rare for pretty every purchasable good out there beyond digital games with companies saying something is X% off leading to more purchasing with consumers thinking they are getting a deal.
Publishers I believe are also the ones with power to fill the market with Steam keys to then have it priced however they want and including them in bundles that are sometimes less than the price of just the game alone during a sale. Some publishers opt to not make steam keys available at all.
As consumer it’s just unusual to see accusations of price fixing, since I can so easily get steam keys for cheaper. And only times I usually go buy direct from Steam these days is if a company doesn’t offer steam keys, so the only way to buy a steam copy is through steam. And prices for games feel like they’ve been so cheap that it’s the one thing I have no complaints about.