The problem is that the world is at neoliberal capitalism's end, as predicted by Marx. Basically, in capitalism, you pay for continuing investment (of capital owners) with giving them more property, which is something that cannot continue indefinitely. That internally increases social inequality, and the money will eventually accumulate at the top (in the form of asset price rises).
Capitalism's own solution so far was to create more available properties - more individual debt such as credit cards and mortgages, privatize public goods like health and education, more destruction of ecosystems, selling attention and disrupting work, and the latest fad, cryptocurrencies. But these are only temporary solutions, they do not address the core problem of increasing social inequality.
Likewise, printing money and giving them to the poor (while half of it goes directly to the top, because the decision-makers are only human) is a stopgap solution in the system where most money quickly end up accumulated at the top. It's a desperate attempt by governments to maintain social order.
In the middle of 20th century, the capitalism's tendency to create disparity was somewhat resolved in Keynesian approach, where state "investments" (based on taxation) were basically redistribution of the money back to the bottom, so that the process of accumulation could continue slower and indefinitely. That was eventually abandoned, for ideological reasons (people shouldn't get "free money", and the "private property" is sacrosanct).
However, it is the only known solution. The proper taxation of the rich (and property) is badly needed to long-term stabilize the capitalist system.
One could make an analogy with any other competition. When another competition starts, winners (of the old competition) are usually given the same place at the start as everybody else. This is because without this rule, the competition would quickly demotivate everybody. But this is happening under neoliberalism, and threatens to eventually halt the positives of the capitalist competition.