It's not a solution to anything. Microearnings have always been a waste of time. Only the poorest and most desperate people do them, and still it's not worth for them. They would have been better off spending that time on developing skills that could help them earn better money - these days you can learn almost anything on the Internet.
And even thinking about macroeconomic effects of microearnings is just funny.
Microearnings have already helped early BTC adopters to earn from zero considerable sums of money in current BTC rates. It's not always a waste of time. Sometimes there is long term potential on microearnings offers and they should be analyzed by people who are looking for opportunities and can't find them on their local communities. Each case is one case. What works for you might not work for someone else, but what works for him, might not work for you.
Therefore, I don't discourage anyone from seeking for offers, even inside the microearnings niche. The important thing is to be constantly searching something to make an income from, even when it seems nothing is going to work for you. It's necessary to be attentive to what life is bringing and trying to show. There might lie the opportunity you have been looking for, but couldn't find so far.