My proposed 28th amendment: congress prohibited from passing subsidies unless reduces cost

My proposed 28th amendment: Congress cannot pass new subsidies (for things such as childcare, education, healthcare, or housing) unless the legislation includes specific and actionable provisions that reduce the cost of the goods and services being subsidized, so as to prevent a situation where total costs are merely shifted onto the federal govt.


An example: under the 28th amendment, a democratic president and congress would not be allowed to pass enhanced childcare subsidies unless the legislation also includes sections that decrease the cost of childcare regulations or reduce barriers to entry into the industry.