Standing up for BC at whose expense?

The Conservatives have released a BC plank to their policy platform. Included within it is this statement, which deserves to be fleshed out a little:

Under a Conservative government, British Columbia will have more seats in the House of Commons and more equitable representation in the Senate.

How will this be accomplished? Changing the number of senate seats for BC is in itself a reasonable proposal--but the only way to accomplish that is to negotiate an emendation to the constitution, which is a pretty hard thing to do.

And an increase in the number of seats for BC? Perhaps that's justifiable, too, but it would be a difficult thing to do without decreasing the number of seats allotted to the Atlantic provinces, Saskatchewan, and Manitoba.