>>1841778OP is asking fair questions, and the answer is that capitalism will always tend towards financialization like this. However, there is always a fundamental tension between high finance capital and actually productive capital. Finance can pump productive capital for wealth, but only up to a point. If you go too far you undermine the productive base. That's why the tendency (if they're being smart) is to put the squeeze on what are basically worker concessions like benefits and workplace safety. However, that is even more limited, so the incentive for finance is to keep squeezing and actually affect production. Depending on the balance of political power, that tendency will get corrected sooner or later. You might have a relatively stable balance or an oscillation like a pendulum swinging back and forth. This is one of the causes of recurrent crises in capitalism.
One of the most noticeable material differences in AES countries is that the "finance sector" equivalent is usually managed by the state, making them largely immune to these sorts of crises, since they operate according to managing production rather than maximizing profit for the finance sector.