This is reminiscent of the Brexiter take on the EU.
Doing stuff that helps big business, good.
Doing stuff that helps people, bad.
(Obviously your rank and file Brexiter believes the exact opposite of this, sort of e.g. we don't want fundamental human rights if it means a famous murderer gets to vote in our not even proportional system, and "it's all useless red tape about how bendy bananas can be" referring to documents written by the banana industry to make their life easier).
Slightly suspicious that the abstract of this link doesn't seem to support the claim:
> and studies suggest that the common external tariff of the EAC has not always been used to improve the economic welfare of citizens.
And it's a weak wishy-washy claim anyway. Sounds like they don't like the tariff but don't have any good reason to support that belief/preference.