Comment by ACS_Solver

Then you get worse good and services. Lower quality or longer wait, or don't get it at all depending on the good. The effect isn't that different from being poor in a capitalist economy. In a capitalist economy, it's mostly money that determines what you can buy. In the Soviet blat-heavy economy, money didn't matter as much connections.

It was perfectly possible to have a decent salary but nothing to spend it on because the better items just aren't available. Maybe there's some delicacy you enjoy, or a special item you want like a cassette player and you could afford those if the store actually had them, but they don't. In that situation, your ability to buy more desirable items depended more on your connections or perseverance in doing things "the hard way" like queuing for hours to buy bananas, or recycling enough kilograms of paper to buy a book.