[oh, before edit the parent post asked what is "rentier"]
It means that the profit on/from that specific form of economic activity is due to market inefficiencies, not due to the actual added value.
So, if more money chases the same stock of housing, rents and housing prices go up, yet no value was added to the houses.
Similarly, if opening a bank is impossibly hard, banks can be assholes, they can raise monthly fees and so on.
> sorry your post is juvenile garbage. banks do not suppress industry or consumers, they finance it.
It's a complicated problem. Sometimes they do their job with so much passion that "industry and consumers" seem to depend on them, i.e. on the banks, instead of vice-versa. See the 2007-2008 crisis and the cries of "the world will die if we let the banks fail".
The reason manufacturing has moved to China is simply because it's cheaper to make stuff there.