Neither of the expressions you use are familiar to me -- if I heard that "all the crimes have been put into one bag" I would be very confused. The only expression I can think of at all similar to the meaning you're seeking is "painted with the same brush," but its not very common.
Yogi's phrases remind me a bit of the expression "to put all your eggs in one basket." It sounds as if that may be the idiom he/she is searching for, but it doesn't mean "to classify as belonging to the same group."
No, indeed, "put your eggs in one basket" means: to risk losing everything by putting all your efforts or all your money into one plan or one course of action And I think "they're a dime a dozen" means "it's quite common, nothing exceptional"