That's largely by design.

They hope to absorb the socially liberal/fiscally conservative upper middle class who feel out of place in the current version of the republican party. Those people won’t support Sanders style policies. At the same time, they’ll try to corral their coalition of aggrieved minorities by appointing a few to key positions, and by bleating about white/male privilege. The last thing they want to do is promote policies that actually benefit people.