Don't assume things - I have no problems with better quality anywhere.YOU may not like the degree of quality that others are profiting from but its still a working strategy.
What I try to tell you is that people who have money to spend are rarely interested in spending it on a better game - they are interested in spending it for getting more money back, because that is the reason why they have the money to spend.
Direct fees to spend for selling games are OK, that will get people who have no resources out. Requiring money indirectly to fake quality that is not there (purchasing reviews and downloads), especially if that money is more than the average indie developer can really spend (creating a paywall for only the big companies).
And if you think that more money means more quality, you probably never heard of the case that was called "the worst game in history":
They spend 20 millions to get the licence and then considered that they could make the game in a few weeks for a 200.000$ and still get a game good enough to earn them their 20M$ back...
OK, that was the most extreme case ever - but the game history is littered with similiar games where the top managers thought they should spend most of the budget on licence and advertisement and shorted the part of the game development cost. It's the same with "early access" and "public betas" - there was a time when it was normal that a game was completely tested and developed before it was sold, but that requires to put real money into game development and wait for the results.
Today a lot of the big companies only care for cheap cash-cows that cost less in development, or why do you think that a lot of good new titles come from small indies that can't pay for good graphics or advertisement?
And those would be thrown out of the market if the paywall for getting the games known rises too much.
And that is the problem with purchasing downloads to get even a tiny step into sales - it will create restrictions that are nothing for the big companies (who are mostly interested in profit) but are a big problem for the medium-sized indies (that get most of the quality games out).