If the government would stop giving so much money away, then our country's financial health would be so much better. Quite a lot goes into "entitlement" programs, which were never funded, or were known to be Ponzi schemes from the start. The Constitution needs to be amended to prohibit deficit...
It goes like millions, billions, trillions, and when our budget problems are in trillions, anything in tens of millions is in the noise and can't really be detected.
Either the crankshaft would need to be resurfaced and a bearing found which is suitably snug, or the whole engine would need to be rebuilt. Taking out the crankshaft and putting it back in is very risky since the bearings may not settle the same way, and new problems could develop.
But people hardly ever pay with cash any more. The existing pennies should last a long time.
With all the inflation, they should have cancelled coin money entirely.
Maybe the shop you have been going to is not a good shop? I have been guilty of returning repeatedly to a bad shop, while expecting a better outcome compared to previous visits.