I really see no easy solution for this because Steemit isn't really designed to support a price floor on the cost of labor. This means the established bloggers eventually will be priced out of the market if the market is efficient because they are "too expensive" for the quality of content they produce. This is going to keep happening in cycles as formerly cheap bloggers become "too expensive" as the price of Steem drops. The only way out of this is for the price of Steem to keep increasing so that cost cutting isn't necessary.
Just like in business, when a business is short on revenue one of the things it does is lay people off or cut the pay of it's employees. So of course in the Steemit scenario cases will be made that certain bloggers are too expensive for the network to support at this time. But it doesn't mean there are any better bloggrs to replace them. Yes the network can afford to put in place for argument 5 Indian bloggers for every US or UK blogger, due to the fact that in different countries $5-10 means a lot more than it does in other countries. So the reward values are not at all universal to all participants which means eventually the US/UK bloggers everywhere will either deem it's not worth the time or they'll see growth.
Growth doesn't have to be in the $ per post, but it has to be somewhere, such as followers gained per post, or something else. The problem with the Steemit UI is it doesn't help bloggers to track any other important metrics except $ per post, so as a result bloggers are obsessed with that.