Do sins accumulate?

The vainglory of a reluctant sunset. Mixing unproductivity of lethargy with incessant clockwork of passing hours has never been ideal. The voices are screaming incoherent curses in my subconscious. Fighting to loosen the chains of frugality. The days are ticking away like the numb less buzz of a lone insect at my window. The question to be asked is, do we, or do we not believe and trust in the rebound of karma? Collected offenses of long dead misdeeds. How do you think sin accumulates? Drop by drop, trickle by trickle till the lid turns up and the accumulated pitch of sins explodes into space. 
But does the idea really function? Is there a law of nature that balances and evens out, the count of goods to the count of bads. Then why does every scripture sing verses on the criticality of a sinfree existence? If sin doesn't bring forth retribution then is there even a fraction of chance for the ideals to survive, into a world where the lines between black and white are starting to blurr. The boundaries of human conscious and guilt free deference are dwindling of late. The monsters roam unchained. Not long before dark singularities consume the virtues of life.