Proposal: if a paper isn't reproduced in ten years after publication, then it gets automatically retracted (which can be reversed as soon as it is reproduced). Any papers that cite the retracted study (in a way that the conclusions depend on it) would also get retracted. That would be powerful incentive for all the researchers who cite the study to try and reproduce it so their papers don't get retracted.
You could still search these retracted studies when doing research, of course. You just can't cite them.
You could still search these retracted studies when doing research, of course. You just can't cite them.