The problem is not coming from the taxes or the public services, but from the bureaucracy and the insane amount of norms and regulations that are at best questionable, and plummeting all kind of efficiency.
I am from France, and it is a catastrophe to see the amount of administrative bullshit public agents have to go through just to issue a simple document, and I thought it was the absolute worst... till I moved to Germany and I realized it was even worse, thanks god, it's only the spearhead of Western Europe, what wrong could happen... This combined with the overall aging population which is preventing any form of further digitization or drastic changes, the low-wages in the public sector which are far from attracting the sharpest knifes in the kitchen drawer; you have a recipe for nightmare, inefficiency and down the line, hurt economy.