"Switch" sharing settings on child classes

Question

The answer in this question doesn't work so please don't close this question!!

I want to write the a selector class and have three version of this implementation:

• one with sharing
• one without sharing
• and another one with inherited sharing

I got the design below but I really don't like having to declare the method again and the call the method version in the super class.

Does anybody know how can I achieve the same thing without having the write the methods again in the child classes?

public inherited sharing virtual class ExpensesSelector {
public virtual List<Expense> selectAll() {
    return [SELECT Amount, TransactionDate FROM Expense];
}

public with sharing class WithSharingImplementation
        extends ExpensesSelector {
    public override List<Expense> selectAll() {
        return super.selectAll();
    }
}

public without sharing class WithoutSharingImplementation
        extends ExpensesSelector {
    public override List<Expense> selectAll() {
        return super.selectAll();
    }
}

}

EDIT: The design below is a simplified version of the design accepted as correct answer in the question I mentioned before. An implementation of the same design, just changing the sObject, can be found in this gist.

public class ExpensesSelector {
public abstract class ExpensesDataService {
    public List<Expense> selectAll() {
        return [SELECT Amount, TransactionDate FROM Expense];
    }
}

public with sharing class WithSharing
        extends ExpensesDataService {

}

public without sharing class WithoutSharing
        extends ExpensesDataService {

}

}