Team GB matched their record medal hall in Russia with four podium finishes, including gold in the women's skeleton.
Hay told Team GB's official website: "We are certainly heading in the right direction in terms of athletes competing for medals. It is a good platform to move on from.
"It is about being credible and being able to prove we are worth investing in. We are making a difference here. Invest in us and we'll show you what we can do in Pyeongchang."
Russia finished top in the medal table with 13 golds, 11 silvers and nine bronze.