"Critics say that these proposals could allow government authorities to impose a social credit score system and decide how their citizens can spend their money."
This is exactly what government authorities will do once they have the people's balls firmly in their grip. Of this there is absolutely no doubt. The principle is already deeply embedded in the philosophy of high tax welfare statism.
In Canada, for example, the various levels of government grab about half of the earnings of private sector workers in order to spend them in accordance with the preferences and priorities of a proportionately small number of elected politicians. Canadian politics at every level is nothing but a permanent civil war between groups of individuals all vying for a favourable distribution of the dollars that are funneled through the politician's sticky hands.
Try reading through your income tax return for any year. It could all be done on one page but instead it is a fantastically complicated mish-mash of what are the exact equivalents of social credit scores. It is a solid testament to the maniacal impulse of the vast majority of politicians for absolute and complete control of how the earnings of the people are spent.
The money you have left over after taxes is nothing more than an allowance. Don't give these power-hungry zealots the power to control how you spend that pittance too.