2019 manifestos are not yet available. So I guess you are thinking of the Labour policies in the 2017 election. Which policy was only possible after Brexit? The IFS (Institute for Fiscal Studies who fact check all public finance here) were critical of both 2017 manifestos, but were far more directly critical of the Tory one as being damaging to the UK economy.

It is a very long time since the Tory party could be considered a safe pair of hands economically.