The clue is in the name. Working class doesn't mean you earn more than average and have some savings. You're working class if you live from your work rather than your capital.
My household income is in the top 0.7% in the Netherlands, yet I'll never accumulate enough capital to stop working, so I'm working class.
115k€ gross, that gives you about 67k€ net. 5600€ per month. Minus a 2200€ mortgage, 400€ of health insurance, 1200€ of childcare, 200€ for the car repayment and insurance, 200€ for the water/electricity/internet and 800€ of groceries, that leaves me with a whopping 600€ per month.
My class interests are infinitely closer to a part-time starbucks barista than they are to a millionaire.