It's a bit like the natural law that has governed this for years.
A link can be made with an earlier question. A small tax incentive could reverse the process. That would put it back in the hands of the large companies, which would be looking for those companies to include them in their supply chain.
It's up to the government to get the system moving. I know it's difficult, but if there were a small incentive in place for large companies, they'd be the ones getting the system moving. The problem would disappear, and at the same time, it would make your job a lot easier.